ok, since my teacher isnt doing a very good job at explaining this we need to know for quizzes, I was wondering if you guys can help me.

here are some of the questions om stuck on

1.Find the limit if it exists

Lim log (x-4)

x->4 5

2.Find the derivatives

g(x)=ax+b/cx+d, where a, b, c, and d are constants with ad - bc /= 0

3.

h(x)= x - x/\3

thx