Let f(x) = 5x2 cos(8x). f' (x) = 10x cos( 8x ) - 40x- sin ( 8x) f'(2) = 20 . cos ( 16) - (80) sin ( 16 ) f"(x) = 10 cos( 8x) + (10x( -cos( 8x ) 8 f"(2) = 10 cos (16) + 20( -cos( 16) 8) Note: You can earn partial credit on this