Which of the following integrals represents the area at the region enclosed by the graphs oof f ( x ) = x" and gc xs = 4 x ? ( y x - x " ) d x O cyx - xu) dx ? [ cux - x us dx 2 , find the function foxs described by the minal-valve problem. "exs = 1, f'cos = 2 Rcos - 3 a, fex) = ( x + J 3 ) 2 by x 2 ( ) fc x) = 1/2 x 2 + 2 x + 3 d, fox = x 2 + 2 x + 3 e , f c x ) = 1 x 2 + x + 3