Question

What is the difference quotient of [1/(Z+2)] ?

Answer 1

the difference quotient of f(x) is\[{f(x+h)-f(x)\over h}\]for you, \(\large f(z)={1\over z+2}\)so simply substitute in the values into the formula

Answer 2

if \[f(z)={1\over z+2}\]what is\[f(z+h)\]?