Casio CFX-9970G User manual

Basic Operation
1-1 Before Starting Calculations...
1-2 Memory
1-3 Option (OPTN) Menu
1-4 Variable Data (VARS) Menu
1-5 Program (PRGM) Menu
1
Chapter

14
1-1 Before Starting Calculations...
Before performing a calculation for the first time, you should use the set up screen
to specify the angle unit and display format.
kk
kk
kSetting the Angle Unit (Angle)
1. Display the set up screen and use the fand ckeys to highlight “Angle”.
2. Press the function key for the angle unit you want to specify.
•{Deg}/{Rad}/{Gra} ... {degrees}/{radians}/{grads}
3. Press Jto return to the screen that was on the display when you started the
procedure.
• The relationship between degrees, grads, and radians is shown below.
360°= 2πradians = 400 grads
90°= π/2 radians = 100 grads
kk
kk
kSetting the Display Format (Display)
1. Display the set up screen and use the fand ckeys to highlight “Display”.
2. Press the function key for the item you want to set.
•{Fix}/{Sci}/{Norm}/{Eng} ... {fixed number of decimal places specification}/
{number of significant digits specification}/{exponential format display
range toggle}/{Engineering Mode}
3. Press Jto return to the screen that was on the display when you started the
procedure.
uu
uu
uTo specify the number of decimal places (Fix)
Example To specify two decimal places
1(Fix) 3(2)
Press the function key that corresponds to the
number of decimal places you want to specify
(
n = 0 to 9).
• Displayed values are rounded off to the number of decimal places you specify.

15
Symbol Meaning Unit
E Exa 1018
P Peta 1015
T Tera 1012
G Giga 109
M Mega 106
k kilo 103
Before Starting Calculations... 1 - 1
uu
uu
uTo specify the number of significant digits (Sci)
Example To specify three significant digits
2(Sci) 4(3)
Press the function key that corresponds to
the number of significant digits you want to
specify (
n = 0 to 9).
• Displayed values are rounded off to the number of significant digits you specify.
• Specifying 0 makes the number of significant digits 10.
uu
uu
uTo specify the exponential display range (Norm 1/Norm 2)
Press 3(Norm) to switch between Norm 1 and Norm 2.
Norm 1: 10–2 (0.01)>|x|, |x| >1010
Norm 2: 10–9 (0.000000001)>|x|, |x| >1010
uu
uu
uTo specify the engineering notation display (Eng)
Press 4(Eng) to switch between engineering notation and standard notation.
The indicator “/E” is on the display while engineering notation is in effect.
The following are the 11 engineering notation symbols used by this calculator.
• The engineering symbol that makes the mantissa a value from 1 to 1000 is
automatically selected by the calculator when engineering notation is in effect.
Symbol Meaning Unit
m milli 10–3
µmicro 10–6
n nano 10–9
p pico 10–12
f femto 10–15

16
1 - 1 Before Starting Calculations...
kk
kk
kInputting Calculations
When you are ready to input a calculation, first press Ato clear the display.
Next, input your calculation formulas exactly as they are written, from left to right,
and press wto obtain the result.
Example 1 2 + 3 – 4 + 10 =
Ac+d-e+baw
Example 2 2(5 + 4) ÷(23 ×5) =
Ac(f+e)/
(cd*f)w
kk
kk
kCalculation Priority Sequence
This calculator employs true algebraic logic to calculate the parts of a formula in
the following order:
1Coordinate transformation Pol (x, y), Rec (r, θ )
Differentials, quadratic differentials, integrations, Σcalculations
d/dx, d2/dx2, ∫dx, Σ, Mat, Solve, FMin, FMax, List→Mat, Fill, Seq, SortA, SortD,
Min, Max, Median, Mean,Augment, Mat→List, List
ALGBR Mode unique commands
expand(, factor(, tExpand(, tCollect(, ∫ (, diff(, solve(, tanLine(, collect(,
combine(, sequence(, sumSeq(, expToTrig(, trigToExp(, signum(
2Type A functions
With these functions, the value is entered and then the function key is pressed.
x2, x–1, x!, °’ ”, ENG symbols
3Power/root ^(xy), x
4Fractions ab/c
5Abbreviated multiplication format in front of π, memory name, or variable name.
2π, 5A, X min, F Start, etc.
6Type B functions
With these functions, the function key is pressed and then the value is entered.
, 3, log, In, ex, 10x, sin, cos, tan, sin–1, cos–1, tan–1, sinh, cosh, tanh, sinh–1,
cosh–1, tanh–1, (–), d, h, b, o, Neg, Not, Det, Trn, Dim, Identity, Sum, Prod,
Cuml, Percent, AList
7Abbreviated multiplication format in front of Type B functions
2, A log2, etc.3
8Permutation, combination nPr, nCr
9×, / (÷)
0+, –

17
!Relational operator
=, G, >, <, ≥, ≤
@And, and
#Or, or, xor, xnor
• Execution is normally performed from left to right, except in the following cases
when it is performed from right to left.
·When functions with the same priority are used in series:
exIn →ex{In( )}
120 120
·When power calculations are used in series in theALGBR Mode:
[5^3^2 →5^(3^2)]
·To produce the same result in the RUN Mode, the above calculation should
be input: (5^3)^2
• Compound functions are executed from right to left.
• Anything contained within parentheses receives highest priority.
Example 2 + 3 ×(log sin2π2+ 6.8) = 22.07101691 (angle unit = Rad)
kk
kk
kMultiplication Operations without a Multiplication Sign
You can omit the multiplication sign (×) in any of the following operations.
Example 2sin30, 10log1.2, 2 , 2Pol(5, 12), etc.
3
• Before constants, variable names, memory names
Example 2π, 2AB, 3Ans, 3Y1, etc.
• Before an open parenthesis
Example 3(5 + 6), (A + 1)(B – 1), etc.
Before Starting Calculations... 1 - 1
1
2
3
4
5
6

18
1 - 1 Before Starting Calculations...
kk
kk
kStacks
The unit employs memory blocks, called stacks , for storage of low priority values
and commands. There is a 10-level numeric value stack , a 26-level command
stack , and a 10-level program subroutine stack . An error occurs if you perform a
calculation so complex that it exceeds the capacity of available numeric value
stack or command stack space, or if execution of a program subroutine exceeds
the capacity of the subroutine stack.
Example
• Calculations are performed according to the priority sequence. Once a
calculation is executed, it is cleared from the stack.
• Storing a complex number takes up two numeric value stack levels.
• Storing a two-byte function takes up two command stack levels.
kk
kk
kInput, Output and Operation Limitations
The allowable range for both input and output values is 10 digits for the mantissa
and 2 digits for the exponent. Internally, however, the unit performs calculations
using 15 digits for the mantissa and 2 digits for the exponent.
Example 3 ×105÷7 – 42857 =
AdEf/hw
dEf/h-
ecifhw
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1
2
3
4
5
b
c
d
e
f
g
h
2
3
4
5
4
×
(
(
+
×
(
+
...
...
Numeric Value Stack Command Stack

19
kk
kk
kOverflow and Errors
Exceeding a specified input or calculation range, or attempting an illegal input
causes an error message to appear on the display. Further operation of the
calculator is impossible while an error message is displayed. The following events
cause an error message to appear on the display.
• When any result, whether intermediate or final, or any value in memory
exceeds ±9.999999999 ×1099 (Ma ERROR).
• When an attempt is made to perform a function calculation that exceeds the
input range (Ma ERROR).
• When an illegal operation is attempted during statistical calculations (Ma
ERROR). For example, attempting to obtain 1VAR without data input.
• When the capacity of the numeric value stack or command stack is exceeded
(Stk ERROR). For example, entering 25 successive (followed by 2 +3 *
4w.
• When an attempt is made to perform a calculation using an illegal formula (Syn
ERROR). For example, 5 ** 3 w.
• When you try to perform a calculation that causes memory capacity to be
exceeded (Mem ERROR).
• When you use a command that requires an argument, without providing a valid
argument (Arg ERROR).
• When an attempt is made to use an illegal dimension during matrix calculations
(Dim ERROR).
• When no solution exists for an ALGBR Mode operation (Undefined).
• When the result of anALGBR Mode operation exceeds the range of the
calculator (Overflow ERROR).
• When a value input in the ALGBR Mode is outside the domain of the operation
being performed (Domain ERROR).
• When anALGBR Mode operation in which only real numbers have been input
produces a result that is a complex number while the set up screen'sAnswer
Type item is specified as "Real" (Non-Real ERROR).
• When no solution can be obtained using the Solve Function in theALGBR
Mode (No Solution).
• When an attempt is made to use approx with an expression that generates an
error unique to theALGBR Mode (Ma ERROR).
• Other errors can occur during program execution. Most of the calculator’s keys
are inoperative while an error message is displayed.You can resume operation
using one of the two following procedures.
• Press the Akey to clear the error and return to normal operation.
• Press dor eto display the error.
Before Starting Calculations... 1 - 1
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20
1 - 1 Before Starting Calculations...
kk
kk
kMemory Capacity
Each time you press a key, either one byte or two bytes is used. Some of the
functions that require one byte are: b, c, d, sin, cos, tan, log, In, , and π.
Some of the functions that take up two bytes are d/dx(, Mat, Xmin, If, For, Return,
DrawGraph, SortA(, PxIOn, Sum, and an+1.
When the number of bytes remaining drops to five or below, the cursor automati-
cally changes from “ _ ” to “ v”. If you still need to input more, you should divide
your calculation into two or more parts.
• As you input numeric values or commands, they appear flush left on the dis-
play. Calculation results, on the other hand, are displayed flush right, except in
theALGBR Mode.
kk
kk
kGraphic Display and Text Display
The unit uses both a graphic display and a text display. The graphic display is
used for graphics, while the text display is used for calculations and instructions.
The contents of each type of display are stored in independent memory areas.
uu
uu
uTo switch between the graphic display and text display
Press !6(G↔T). You should also note that the key operations used to clear
each type of display are different.
uu
uu
uTo clear the graphic display
Press !4(Sketch) 1(Cls) w.
uu
uu
uTo clear the text display
Press A.
kk
kk
kEditing Calculations
Use the dand ekeys to move the cursor to the position you want to change,
and then perform one of the operations described below. After you edit the
calculation, you can execute it by pressing w, or use eto move to the end of
the calculation and input more.
uu
uu
uTo change a step
Example To change cos60 to sin60
cga
ddd
s

21
Before Starting Calculations... 1 - 1
uu
uu
uTo delete a step
Example To change 369 × × 2 to 369 ×2
dgj**c
ddD
uu
uu
uTo insert a step
Example To change 2.362to sin2.362
c.dgx
ddddd
![
s
• When you press ![ the insert location is indicated by the symbol ‘‘t’’.
The next function or value you input is inserted at the location of ‘‘t’’. To abort
the insert operation without inputting anything, move the cursor, press ![
again, or press d, eor w.

22
1-2 Memory
kk
kk
kVariables
This calculator comes with 28 variables as standard. You can use variables to
store values to be used inside of calculations. Variables are identified by single-
letter names, which are made up of the 26 letters of the alphabet, plus rand θ .
The maximum size of values that you can assign to variables is 15 digits for the
mantissa and 2 digits for the exponent. Variable contents are retained even when
you turn power off.
uu
uu
uTo assign a value to a variable
[value] a[variable name] w
Example To assign 123 to variable A
AbcdaaAw
Example To add 456 to variable A and store the result in variable B
AaA+efgaaBw
uu
uu
uTo display the contents of a variable
Example To display the contents of variable A
AaAw
uu
uu
uTo clear a variable
Example To clear variable A
AaaaAw
• To clear all variables, select “Memory Usage” from the SYS Mode.
uu
uu
uTo assign the same value to more than one variable
[value]a[first variable name]a3(~) [last variable name]w
• You cannot use “r” or “ θ ” as a variable name in the above operation.
Example To assign a value of 10 to variables A through F
Abaa!aA
3(~)Fw

23
Memory 1 - 2
kk
kk
kFunction Memory [OPTN]-[FMEM]
Function memory is convenient for temporary storage of often-used expressions.
For longer term storage, we recommend that you use the GRAPH Mode for
expressions and the PRGM Mode for programs.
•{STO}/{RCL}/{fn}/{SEE} ... {function store}/{function recall}/{function area
specification as a variable name inside an expression}/{function list}
uu
uu
uTo store a function
Example To store the function (A+B) (A–B) as function memory number 1
K6(g)6(g)3(FMEM)A
(aA+aB)
(aA-aB)
1(STO) 1(f1)
• If the function memory number you assign a function to already contains a
function, the previous function is replaced with the new one.
uu
uu
uTo recall a function
Example To recall the contents of function memory number 1
K6(g)6(g)3(FMEM)A
2(RCL)1(f1)
• The recalled function appears at the current location of the cursor on the
display.
uu
uu
uTo display a list of available functions
K6(g)6(g)3(FMEM)
4(SEE)
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24
uu
uu
uTo delete a function
Example To delete the contents of function memory number 1
K6(g)6(g)3(FMEM)A
1(STO) 1(f1)
• Executing the store operation while the display is blank deletes the function in
the function memory you specify.
uu
uu
uTo use stored functions
Once you store a function in memory, you can recall it and use it for a calculation.
This feature is very useful for quick and easy input of functions when programming
or graphing.
Example To store x3+ 1, x2+ xinto function memory, and then graph:
y= x3+ x2+ x+ 1
Use the following View Window parameters.
Xmin = –4 Ymin = –10
Xmax = 4 Ymax = 10
Xscale = 1 Yscale = 1
!Zc1(Y=)JK6(g)6(g)3(FMEM)
AvMd+b1(STO)1(f1)(stores (x3+ 1))
Avx+v1(STO)2(f2)(stores (x2+ x))
A!4(Sketch)1(Cls)w
!4(Sketch)5(GRPH)1(Y=)
K6(g)6(g)3(FMEM)
3(fn)1(f1)+2(f2)w
• For full details about graphing, see “8. Graphing”.
kk
kk
kMemory Status
You can check how much memory is used for storage for each type of data. You
can also see how many bytes of memory are still available for storage.
uu
uu
uTo check the memory status
1. In the Main Menu, select the SYS icon and
press w.
1 - 2 Memory
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25
2. Press cwto display the memory status
screen.
3. Use fand cto move the highlighting and view the amount of memory (in
bytes) used for storage of each type of data.
The following table shows all of the data types that appear on the memory status
screen.
Data Type Meaning
Program Program data
Statistics Statistical calculations and graphs
Matrix Matrix memory data
List File List data
Y= Graph functions
Draw Memory Graph drawing conditions (View Window,
enlargement/reduction factor, graph screen)
Graph Memory Graph memory data
View Window View Window memory data
Picture Graph screen data
Dynamic Graph Dynamic Graph data
Table Function Table & Graph data
Recursion Recursion Table & Graph data
Equation Equation calculation data
Alpha Memory Alpha memory data
Function Mem Function memory data
Financial Financial data
Memory 1 - 2
Number of bytes still free

26
1 - 2 Memory
kk
kk
kClearing Memory Contents
Use the following procedure to clear data stored in memory.
1. In the memory status screen, use fand cto move the highlighting to the
data type you want to clear.
If the data type you select in step 1 allows deletion of specific data
2. Press 1(DEL).
3. Press the function key that corresponds to the data you want to delete.
• The above example shows the function menu that appears when you highlight
{List File} in step 1.
4. Press 1(YES).
If the data type you select in step 1 allows deletion of all data only
2. Press 1(DEL).
3. Press 1(YES) to delete all of the data.
123456
123456
*This menu appears when you
select List File.
123456

27
1-3 Option (OPTN) Menu
The option menu gives you access to scientific functions and features that are not
marked on the calculator’s keyboard. The contents of the option menu differ
according to the mode you are in when you press the Kkey.
See the Command List at the back of this user’s guide for details on the option
(OPTN) menu.
uu
uu
uOption Menu in the RUN and PRGM Modes
•{LIST} ... {list function menu}
•{MAT} ... {matrix operation menu}
•{CPLX} ... {complex number calculation menu}
•{CALC} ... {functional analysis menu}
•{STAT} ... {paired-variable statistical estimated value menu}
•{COLR} ... {graph color menu}
•{HYP} ... {hyperbolic calculation menu}
•{PROB} ... {probability/distribution calculation menu}
•{NUM} ... {numeric calculation menu}
•{ANGL} ... {menu for angle/coordinate conversion, sexagesimal input/
conversion}
•{ESYM} ... {engineering symbol menu}
•{PICT} ... {graph save/recall menu}
•{FMEM} ... {function memory menu}
•{LOGIC} ... {logic operator menu}
Pressing Kcauses the following function key menu to appear while binary,
octal, decimal, or hexadecimal is set as the default number system.
•{COLR} ... {graph color menu}
uu
uu
uOption Menu during numeric data input in the STAT, MAT, LIST,
TABLE, RECUR and EQUA Modes
•{LIST}/{HYP}/{PROB}/{NUM}/{ANGL}/{ESYM}/{FMEM}/{LOGIC}
uu
uu
uOption Menu during formula input in the GRAPH, DYNA, TABLE,
RECUR and EQUA Modes
•{List}/{CALC}/{HYP}/{PROB}/{NUM}/{FMEM}/{LOGIC}
uu
uu
uOption Menu during expression input in the ALGBR Mode
•{Abs}/{HYP}/{i }/{x!}/{sign}/{FMEM}
The meanings of the option menu items are described in the sections that cover
each mode.
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1-4 Variable Data (VARS) Menu
To recall variable data, press Jto display the variable data menu.
{V-WIN}/{FACT}/{STAT}/{GRPH}/{DYNA}/{TABL}/{RECR}/{EQUA}/{TVM}
See the Command List at the back of this user’s guide for details on the variable
data (VARS) menu.
• Note that the EQUAand TVM items appear for function keys (3and 4)
only when you access the variable data menu from the RUN or PRGM Mode.
• The variable data menu does not appear if you press Jwhile binary, octal,
decimal, or hexadecimal is set as the default number system.
kk
kk
kV-WIN — Recalling View Window values
Selecting {V-WIN} from the VARS menu displays the View Window value recall
menu.
uu
uu
u{X}/{Y}/{T, θ }... {x-axis menu}/{y-axis menu}/{T, θ menu}
uu
uu
u{R-X}/{R-Y}/{R-T, θ } ... {x-axis menu}/{y-axis menu}/{T, θ menu} for right side
of Dual Graph
The following are the items that appear in the above menus.
• {min}/{max}/{scal}/{ptch} ... {minimum value}/{maximum value}/{scale}/
{pitch}
kk
kk
kFACT — Recalling enlargement/reduction factors
Selecting {FACT} from the VARS menu displays the enlargement/reduction factor
recall menu.
• {Xfct}/{Yfct} ... {x-axis factor}/{y-axis factor}
kk
kk
kSTAT — Recalling Single/Paired-variable Statistical Data
Selecting {STAT} from the VARS menu displays the single/paired-variable
statistical data recall menu. {X}/{Y}/{GRPH}/{PTS}/{TEST}/{RESLT}
uu
uu
u{X}/{Y} ... {x-data menu}/{y-data menu}
The following are the items that appear in the above menus.
•{n} ... {number of data}
•{
oo
oo
o}/{
pp
pp
p} ... mean of {x-data}/{y-data}
•{Σx}/{Σy} ... sum of {x-data}/{y-data}
•{Σx
2
}/{Σy
2
} ... sum of squares of {x-data}/{y-data}
•{Σ
xy} ... {sum of products of x-data and y-data}
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29
•{
xσn}/{yσn} ... population standard deviation of {x-data}/{y-data}
•{xσn-1}/{yσn-1} ... sample standard deviation of {x-data}/{y-data}
•{minX}/{minY} ... minimum value of {x-data}/{y-data}
•{maxX}/{maxY} ... maximum value of {x-data}/{y-data}
uu
uu
u{GRPH}...{graph data menu}
The following are the items that appear in the above menu.
•{a}/{b}/{c}/{d}/{e} ... {regression coefficient and multinomial coefficients}
•{r} ... {correlation coefficient}
•{Q1}/{Q3} ... {first quartile}/{third quartile}
•{Med}/{Mod} ... {median}/{mode} of input data
•{Strt}/{Pitch} ... histogram {start division}/{pitch}
•{Iter}/{Perid} ... sine regression {number of iterations}/{period}
uu
uu
u{PTS}... {summary point data menu}
The following are the items that appear in the above menu.
• {x1}/{y1}/{x2}/{y2}/{x3}/{y3} ... {coordinates of summary points}
uu
uu
u{TEST}... {test data recall}
The following are the items that appear in the above menu.
• {n}/{oo
oo
o}/{xσn-1} ... {number of data}/{data mean}/{sample standard deviation}
• {n1}/{n2} ... number of {data 1}/{data 2}
• {oo
oo
o1}/{oo
oo
o2} ... mean of {data 1}/{data 2}
• {x1σ}/{x2σ} ... sample standard deviation of {data 1}/{data 2}
• {xpσ} ... {pooled sample standard deviation}
• {F} ... {Fvalue}
• {Fdf}/{SS}/{MS} ... factor {degrees of freedom}/{sum of squares}/{mean of
squares}
• {Edf}/{SSe}/{MSe} ... error {degrees of freedom}/{sum of squares}/{mean of
squares}
u{RESLT}... {test result recall}
The following are the items that appear in the above menu.
• {p} ... {p value}
• {z}/{t}/{Chi}/{F} ... {Ztest results}/{ttest results}/{χ2test results}/{Ftest
results}
• {Left}/{Right} ... {interval lower limit (left edge)}/{interval upper limit (right
edge)}
• {ˆp}/{ˆp1}/{ˆp2} ... {expected probability value}/{expected probability value 1}/
{expected probability value 2}
• {df}/{s}/{r}/{r2} ... {degrees of freedom}/{standard error}/{correlation
coefficient}/{coefficient of determination}
Variable Data (VARS) Menu 1 - 4

30
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1 - 4 Variable Data (VARS) Menu
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kk
kk
kGRPH — Recalling Graph Functions
Selecting {GRPH} from the VARS menu displays the graph function recall menu.
•{Y}/{r} ... {rectangular coordinate or inequality function}/{polar coordinate
function}
•{Xt}/{Yt} ... parametric graph function {Xt}/{Yt}
•{X} ... {X=constant graph function}
(Press these keys before inputting a value to specify a storage area.)
Example To recall and draw the graph for the rectangular coordinate
function y= 2 x2– 3, which is stored in storage area Y2
Use the following View Window parameters to draw the graph.
Xmin = –5 Ymin = –5
Xmax = 5 Ymax = 5
Xscale = 1 Yscale = 1
!4(Sketch)5(GRPH)1(Y=)
J4(GRPH)1(Y)cw
kk
kk
kDYNA — Recalling Dynamic Graph Set Up Data
Selecting {DYNA} from the VARS menu displays the Dynamic Graph set up data
recall menu.
•{Strt}/{End}/{Pitch} ... {coefficient range start value}/{coefficient range end
value}/{coefficient value increment}
kk
kk
kTABL — Recalling Table & Graph Set Up and Content Data
Selecting {TABL} from the VARS menu displays the Table & Graph set up and
content data recall menu.
•{Strt}/{End}/{Pitch} ... {table range start value}/{table range end value}/{table
value increment}
•{Reslt} ... {matrix of table contents}
• The Reslt item appears for function key 4only when the above menu is
displayed in the RUN or PRGM Mode.
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31
Example To recall the contents of the numeric table for the function
y= 3x2– 2, while the table range is Start=0 and End=6, and pitch=1
4(Reslt)w
kk
kk
kRECR — Recalling Recursion Formula, Table Range, and
Table Content Data
Selecting {RECR} from the VARS menu displays the recursion data recall menu.
uu
uu
u{FORM} ... {recursion formula data menu}
The following are the items that appear in the above menu.
• {an}/{an+1}/{an+2}/{bn}/{bn+1}/{bn+2} ... {an}/{an+1}/{an+2}/{bn}/{bn+1}/{bn+2}
expressions
uu
uu
u{RANG} ... {table range data menu}
The following are the items that appear in the above menu.
• {Strt}/{End} ... {table range start value}/{table range end value}
• {a0}/{a1}/{a2} ... {zero term aovalue}/{first term a1value}/{second term a2
value}
• {b0}/{b1}/{b2} ... {zero term bovalue}/{first term b1value}/{second term b2
value}
• {anSt}/{bnSt} ... origin of {an }/{bn} recursion formula convergence/divergence
graph (WEB graph)
uu
uu
u{Reslt} ... {matrix of table contents}
Selecting {Reslt} displays a matrix that shows the contents of the recursion table.
• This operation is available only in the RUN and PRGM modes.
Example To recall the contents of the numeric table for recursion formula
an= 2n+ 1, while the table range is Start=1 and End=6
3(Reslt)w
Variable Data (VARS) Menu 1 - 4
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• The table contents recalled by the above operation are stored automatically in
Matrix Answer Memory (MatAns).
• An error occurs if you perform the above operation when there is no function or
recursion formula numeric table in memory.
kk
kk
kEQUA — Recalling Equation Coefficients and Solutions
Selecting {EQUA} from the VARS menu displays the equation coefficient and
solution recall menu.
•{S-Rlt}/{S-Cof} ... matrix of {solutions}/{coefficients} for linear equations with
two through six unknowns
•{P-Rlt}/{P-Cof} ... matrix of {solution}/{coefficients} for a quadratic or cubic
equation
Example 1 To recall the solutions for the following linear equations with two
unknowns
2x+ 3y=8
3x+ 5y=14
1(S-Rlt)w
Example 2 To recall the coefficients for the following linear equations with
three unknowns
4x+y–2z=–1
x+6y+3z=1
–5x+4y+z=–7
2(S-Cof)w
Example 3 To recall the solutions for the following quadratic equation
2x2+ x– 10 = 0
3(P-Rlt)w
Example 4 To recall the coefficients for the following quadratic equation
2x2+ x– 10 = 0
4(P-Cof)w
1 - 4 Variable Data (VARS) Menu
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