Casio FX-9860GII-L-IH User Guide - Page 101
Integration Calculations
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2-5-7 Numerical Calculations k Integration 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) ⇒ b f (x)dx a ∫ Area of b f (x)dx is calculated a 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 (2x2 + 3x + 4) dx 1 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). 20050401