Limits of Average Rates of Change

[Colleen Watt]

Evaluate this limit for the following values of x and function f.
Lim h-0 f(x+h) - f(x) divided by h when f(x)=1/x, x=-2?



Second Question Why is 2+7/x^3 divided by 1-1/x+1/x^2+7/x^3 = 2?