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Numerical Calculations

kIntegration Calculations

[OPTN]-[CALC]-[dx]

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

K4(CALC)4(dx) f(x) , a , b , tol )

(a: start point, b: end point, tol: tolerance)

( f(x), a, b, tol) ab f(x)dx

Area of ab 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.

Example

To perform the integration calculation for the function shown

 

below, with a tolerance of “tol” = 1E - 4

 

5

 

1 (2x2 + 3x + 4) dx

Input the function f (x).

AK4(CALC)4(dx)cvx+dv+e,

Input the start point and end point.

b,f,

Input the tolerance value.

bE-e)

w

#If f (x) < 0 where a < x < b, the surface area

calculation produces negative values (surface area – 1).

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