Casio 3950P User's Guide download pdf (Page 36)

E-34

COMP

Differential Calculations

The procedure described below obtains the derivative of a function.

Use the F key to enter the COMP Mode when you want to perform a

calculation involving differentials.

COMP ............................................................................................. F 1

•Three inputs are required for the differential expression: the function of

variable x, the point (a) at which the differential coefficient is calculated,

and the change in x (∆x).

A J expression P a P ∆x T

• Example: To determine the derivative at point x = 2 for the function

y = 3x

– 5x + 2, when the increase or decrease in x is ∆x = 2 × 10

-4

(Result:

)

A J 3 p x K , 5 p x + 2 P 2 P 2 e D 4 T <

•You can omit input of

∆

x, if you want. The calculator automatically

substitutes an appropriate value for

∆

x if you do not input one.

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

inaccurate results and errors.

Integration Calculations

The procedure described below obtains the definite integral of a function.

Use the F key to enter the COMP Mode when you want to perform

integration calculations.

COMP ............................................................................................ F 1

•The following four inputs are required for integration calculations:

a function with the variable x; a and b, which define the integration range

of the definite integral; and n, which is the number of partitions (equivalent

to N = 2

) for integration using Simpson’s rule.

d expression P a P b P n F

• Example: ∫

(2x

+ 3x + 8) dx =

150.6666667

(Number of partitions n = 6)

d 2 p x K + 3 p x + 8 P 1 P 5 P 6 T <

COMP

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Casio 3950P User's Guide Page 36

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