fx-9860GII      TI-83

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FMax

On a Casio calculator you can calculate the function maximum

CALC

▷

FMax

OPTN

F4

F6

F2

Expression

٬

Start point

٬

End point

٬

Precision

)

EXE

or via the CATALOG as

CATALOGP					INPUT
SHIFT		4		FMax(		F1

You can interrupt an ongoing calculation by pressing  AC^/ON .

 

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Explanation

The syntax for the maximum value command is

FMax(  f (x), a, b, n )

where

f (x)	Expression
a	Start point of interval
b	End point of interval
;n	Precision (n = 1 to 9)

 

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Example 1

To determine the maximum value for the function x² − 4x + 9

FMax

≣

X,θ,T

x²

−

4

X,θ,T

+

9

٬

in the interval defined by start point a = 0

0

٬

and end point b = 3

3

٬

with a precision of n = 6

6

)

EXE

which gives for SET UP Input/Output Line

AnS 1 0 2 9   0

and for SET UP Input/Output Math

FMax(X2-4X+9,0,3,6) {0,9}

You can show for x² − 4x + 9 that in the specified interval the maximum is at x = 0 where y = 9.

 

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