20070201k Integration Calculations [OPTN]-[CALC]-[∫ dx]To perform integration calculations, first display the function analysis menu and then input thevalues using the syntax below.K4(CALC)4( ∫dx) f( x) , a , b , tol )(a: start point, b: end point, tol: tolerance)Area of ∫abf(x)dx is calculatedAs shown in the illustration above, integration calculations are performed by calculatingintegral values from a through b for the function y = f (x) where a < x < b, and f (x) > 0. This ineffect calculates the surface area of the shaded area in the illustration.Example To perform the integration calculation for the function shownbelow, with a tolerance of “tol” = 1 E - 4Input 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∫( f(x), a, b, tol) ⇒ ∫ab f(x)dx∫( f(x), a, b, tol) ⇒ ∫ab f(x)dx∫15(2x2 + 3x + 4) dx∫15(2x2 + 3x + 4) dx2-5-7Numerical Calculations# If f (x) < 0 where a < x < b, the surface areacalculation produces negative values (surfacearea × – 1).
