4 4*x
4*x^4
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: x4x^{4}x4 goes to 4x34 x^{3}4x3
So, the result is: 16x316 x^{3}16x3
The answer is:
3 16*x
2 48*x
96*x