the thing with natural log derivatives is that (d/dx) ln(x) is actually (1/x)*x' (so 1 divided by the inside, then times the derivative of the inside)
-4ln(5x) becomes -4*(1/5x)*5 = -4/x
This is the equation I have:
My Work Sheet says the answer is:
My question is, shouldn't it be somthing like:
...when you derive shouldn't it become and from there don't you have to use the chain rule on and get 5?
It seems to me you would only get if
What is it I don't understand?! Thank You