a -- 5 x
d /a \ --|--| dx| 5| \x /
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: 1x5\frac{1}{x^{5}}x51 goes to −5x6- \frac{5}{x^{6}}−x65
So, the result is: −5ax6- \frac{5 a}{x^{6}}−x65a
The answer is:
-5*a ---- 6 x
30*a ---- 7 x
-210*a ------ 8 x