Question

f(x)=(x^6+13)(x^4+1)

Answer 1

f'(x) = (x^6+13)'•(x^4+1)+(x^6+13)•(x^4+1)'=(6x^5)(x^4+1)+(x^6+13)(4x^3)=6x^9+6x^5+6x^8+52x^3=12x^9+6x^5+52x^3