Find the derivatives using limit rule Answer 1 . ) f ( x ) = 3 x 2 + 2 f ( x ) = lex 2 . ) f ( x ) = 5X the f ( x ) = 5 3 . ) f ( x ) = x 2 + 2 x + 1 f ( x ) = 2 X + 2 formula : f ( x + A x ) - f ( x) AX -70