i know you have to use the chain rule but i really need some help. i've got an exam tomorrow and i don't konw how to do this
Remember the properties of logarithms:
I always think of the inner function as a variable so that the application of the chain rule is easier. So think of the function as , where is a function of .
so because it's a logarithm you don' multiply it by 4, and have 3 as an exponent?
One of the properties of logarithms is that . This is just an expression usually introduced in pre-calculus courses. I think that answers your question .