6 7*x
d / 6\ --\7*x / dx
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: x6x^{6}x6 goes to 6x56 x^{5}6x5
So, the result is: 42x542 x^{5}42x5
The answer is:
5 42*x
4 210*x
3 840*x