log(0.0)*5*x
d --(log(0.0)*5*x) dx
The derivative of a constant times a function is the constant times the derivative of the function.
Apply the power rule: xxx goes to 111
So, the result is: 5log(0.0)5 \log{\left(0.0 \right)}5log(0.0)
Now simplify:
The answer is:
nan