1) f'(x)= (4x³)'+(6x)'+3'= 12x²+6+0= 12x²+6
f''(x)= (12x²)'+6'= 24x+0= 24x
2) f'(x)= (7x³)'-(56x)'+8'= 21x²-56+0= 21x²-56
f''(x)= (21x²)'-56'= 42x-0= 42x
1) f'(x)= (4x³)'+(6x)'+3'= 12x²+6+0= 12x²+6
f''(x)= (12x²)'+6'= 24x+0= 24x
2) f'(x)= (7x³)'-(56x)'+8'= 21x²-56+0= 21x²-56
f''(x)= (21x²)'-56'= 42x-0= 42x