X 2 2x 2 81 July 8, 2019 16 32 64 128 X 2 2x 81 0 50 x 2 2x 2 81 X 2 81 2x 2 18x X 2 18x 81 2x 2 14x Integrate x 2 9 x 4 2x 2 81 2 3 x *( 3 2 2x 81 16 81 2 x )-( 11 2 2x )= 70 09