Hello, wayneo1688!

I assume you're new to the Difference Quotient.

Don't let the Difference Quotient scare you.Find . for .

. . Break it down into itsthreebasic steps.

(1) Find . . . Replace with ... and simplify.

(2) Subtract . . . Subtract the original function ... and simplify.

(3) Divide by . . . Factor and cancel (carefully!)

Here we go! . . . We have: .