Casio FX-9750GII User Manual

Page 64

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2-26

• Input of the tolerance (

tol

) value and the closing parenthesis can be omitted.

• Specify a tolerance (

tol

) value of 1

E

–14 or greater. An error (Time Out) occurs whenever no

solution that satisfies the tolerance value can be obtained.

• The rules that apply for linear differential also apply when using a quadratic differential

calculation for the graph formula (see page 2-24).

• Inaccurate results and errors can be caused by the following:

- discontinuous points in

x

values

- extreme changes in

x

values

- inclusion of the local maximum point and local minimum point in

x

values

- inclusion of the inflection point in

x

values

- inclusion of undifferentiable points in

x

values

- differential calculation results approaching zero

• You can interrupt an ongoing quadratic differential calculation by pressing the

key.

• Always use radians (Rad mode) as the angle unit when performing trigonometric quadratic

differentials.

• You cannot use a differential, quadratic differential, integration,

3, maximum/minimum value,

Solve, RndFix or log

a

b calculation expression inside of a quadratic differential calculation

term.

• With quadratic differential calculation, calculation precision is up to five digits for the

mantissa.

• In the Math input/output mode, the tolerance value is fixed at 1

E

–10 and cannot be changed.

I Integration Calculations

[OPTN]-[CALC]-[

°

dx

]

To perform integration calculations, first display the function analysis menu and then input the
values using the syntax below.

*(CALC)* (°

dx

)

f

(

x

)

a

b

tol



* fx-7400G

II

:

(CALC)

(

a

: start point,

b

: end point,

tol

: tolerance)

Area of



a

b

f(x)dx

is calculated

As shown in the illustration above, integration calculations are performed by calculating
integral values from

a

through

b

for the function

y

=

f

(

x

) where

a



x



b

, and

f

(

x

)

 0. This in

effect calculates the surface area of the shaded area in the illustration.



 f(x), a,

b

,

tol) 



a

b

f(x)dx



 f(x), a,

b

,

tol) 



a

b

f(x)dx

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