7 3*x
d / 7\ --\3*x / dx
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: x7x^{7}x7 goes to 7x67 x^{6}7x6
So, the result is: 21x621 x^{6}21x6
The answer is:
6 21*x
5 126*x
4 630*x
15120