User Manual

2-31
k 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 .
u Minimum Value
K4(CALC) * 6( g) 1(FMin) f ( x ) , a , b , n ) * fx-7400GIII: 3(CALC)
(
a : start point of interval, b : end point of interval, n : precision ( n = 1 to 9))
u Maximum Value
K4(CALC) * 6( g) 2(FMax) f ( x ) , a , b , n ) * fx-7400GIII: 3(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 ).
AK4(CALC) * 6( g) 1(FMin) vx-ev+j,
*
fx-7400G
III: 3(CALC)
Input the interval a = 0, b = 3.
a,d,
Input the precision n = 6.
g)w
• In the function f ( x ), only X can be used as a variable in expressions. Other variables (A
through Z excluding X, r ,  ) 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 A 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, Σ , maximum/minimum value,
Solve, RndFix or log
a
b calculation expression inside of a maximum/minimum calculation
term.