iven F x f x dx 3 and Exercise a a Fx Therefore Step 1 To evaluate the integrals use the additive interval property of integrals which is given as follows Step 2 If f is integrable on the three closed intervals determined by a b and c then rb f x dx 2 evaluate the following f x dx Then To evaluate F x f x dx f x dx f f x dx 6 F x dx F x dx f x dx f x dx f x dx f x dx substitute f x dx 3 f x dx and f x dx 1 Xin