Casio FX-100D Manual do Utilizador descarregar pdf (Página 17)

FX 115 MS Training guide

Differential and Integration Calculations

You can obtain the derivative or the definite integral of a function.

Use the [MODE] key to enter the COMP mode when you want to perform differential and

integration calculations. [MODE] [1]

Differential Calculations

Three inputs are required for the differential expression:

the function of variable x

the point (a) at which the differential coefficient is calculated

the change in x

[d/dx] (expression, a, ∆x)

Example: For y = x

+3x + 1, find the derivative at the point x = 2

[SHIFT] [d/dx] [ALPHA] [X] [x

] [+] [3] [ALPHA] [X] [+] [1] [,] [2] [=]. Result =7

• You can omit the input of ∆x. The calculator will automatically substitute an

appropriate value if necessary.

• Discontinuous points and extreme changes in the value of x can cause

inaccurate results and errors.

Integration Calculations

Four inputs are required for integration calculations:

the function of variable x

a and b which define the integration range of the definite integral

n which is the number of partitions (equivalent to N = 2

) for integration using

Simpson’s rule

[

dx] (expression, a, b, n)

∫

Example: For y = 2x +3, for the interval from 1 to 3

[

∫

dx] [2] [ALPHA] [X] [+] [3] [,] [1] [,] [3] [)] [=]. Result =14

• You can omit the input of the number of partitions, or you can specify an integer

in the range of 1 to 9.

• Internal integration calculations may take considerable time to complete.

References the Casio FX-115 MS User’s Guide Casio FX-115MS Scientific calculator

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Casio FX-100D Manual do Utilizador Página 17