2-4-11

Function Calculations

kEqual Symbols and Unequal Symbols (=, ≠, <, >, <, >)

You can use these symbols to perform a number of different basic calculations.

 

Problem

Use this keyboard:

 

Operation

 

 

 

 

 

 

mth

abc

cat

2D

 

 

 

 

 

 

 

 

 

To add 3 to both sides of



MATH

Cmd

 

(X=3 )+3 w

x = 3.

x + 3 = 6

 

 

 

 

 

 

 

 

 

 

 

Subtract 2 from both sides

OPTN

MATH

Cmd

 

(Y 5 )-2w

of y <5.

y – 2 <3

 

 

 

 

 

 

 

 

 

 

 

 

Tip

•In the “Syntax” explanations of each command under “2-7 Using the Action Menu”, the following operators are indicated as “Eq/Ineq”: =, ≠, <, >, <, >. Whether or not the “Eq/Ineq” operators include the “≠” operator is specified for each command by a separate note.

•An expression that contains multiple equation or inequality operators cannot be input as a single expression. For output expressions, an expression can be output with multiple operators only in the case of inequality operators that are facing in the same direction (example: –1< x <1).

Example: solve(x2 – 1 < 0, x) w

{–1 < x < 1}

k“with” Operator ( )

The “with” (I) operator temporarily assigns a value to a variable. You can use the “with” operator in the following cases.

•To assign the value specified on the right side of to the variable on the left side of

•To limit or restrict the range of a variable on the left side of in accordance with conditions

provided on the right side of

The following is the syntax for the “with” (I) operator.

Exp/Eq/Ineq/List/MatEq/Ineq/List/(and operator)

You can put plural conditions in a list or connected with the “and” operator on the right side. “≠” can be used on the left side or the right side of .

Problem

 

Use this keyboard:

 

Operation

 

 

 

 

 

 

 

 

mth

abc

cat

2D

 

 

 

 

 

 

 

 

 

 

 

 

Evaluate x2 + x + 1 when

 

OPTN

SMBL

Cmd

 

X{2 +X+1 UX

x = 3.

13

 

 

 

 

=3 w

 

 

 

 

 

 

 

 

For x2 – 1 = 0, determine

 

OPTN

SMBL

Cmd

 

[solve] X{ 2 -1=0

the value of x when x > 0.

 

 

 

 

,X)UX

0 w

{x = 1}

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Determine the value of

 

OPTN

SMBL

Cmd

 

$X)UX

0 w

abs (x) when x >0.

x

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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