Thread: difference quotient

question: evaluate the diff. quotient for the given function.
1.) f(x) = x^3 , f(a+h) - f(a)/ h

2.) f(x) = x+3/x+1 , f (x)-f(1)/ x-1

3.) f(x) = 1/x , f(x)-f(a)/ x-a

then do it, we need to see some progress from you.