Casio FX-9750GII User Manual
Page 67
2-29
I Maximum/Minimum Value Calculations
[OPTN]-[CALC]-[FMin]/[FMax]
After displaying the function analysis menu, you can input maximum/minimum calculations
using the formats below, and solve for the maximum and minimum of a function within interval
a
x
b
.
S Minimum Value
*(CALC)* (E)(FMin)
f
(
x
)
a
b
n
* fx-7400G
II
:
(CALC)
(
a
: start point of interval,
b
: end point of interval,
n
: precision (
n
= 1 to 9))
S Maximum Value
*(CALC)* (E)(FMax)
f
(
x
)
a
b
n
* fx-7400G
II
:
(CALC)
(
a
: start point of interval,
b
: end point of interval,
n
: precision (
n
= 1 to 9))
Example To determine the minimum value for the interval defined by start
point
a
= 0 and end point
b
= 3, with a precision of
n
= 6 for the function
y
=
x
2
– 4
x
+ 9
Input
f
(
x
).
*(CALC)* (E)(FMin)TV CT H
* fx-7400G
II
:
(CALC)
Input the interval
a
= 0,
b
= 3.
? B
Input the precision
n
= 6.
EU
• In the function
f
(
x
), only X can be used as a variable in expressions. Other variables (A
through Z excluding X,
r
,
Ƨ
) are treated as constants, and the value currently assigned to
that variable is applied during the calculation.
• Input of
n
and the closing parenthesis can be omitted.
• Discontinuous points or sections with drastic fluctuation can adversely affect precision or
even cause an error.
• Inputting a larger value for
n
increases the precision of the calculation, but it also increases
the amount of time required to perform the calculation.
• The value you input for the end point of the interval (
b
) must be greater than the value you
input for the start point (
a
). Otherwise an error occurs.
• You can interrupt an ongoing maximum/minimum calculation by pressing the
key.
• You can input an integer in the range of 1 to 9 for the value of
n
. Using any value outside this
range causes an error.
• You cannot use a differential, quadratic differential, integration,
3, maximum/minimum value,
Solve, RndFix or log
a
b calculation expression inside of a maximum/minimum calculation
term.