If $f(x)=x^2$, then $\frac{f(1.1)-f(1)}{(1.1-1)}$ is equal to

Question

Professor PC Thomas Classes · Answer

$\frac{(1.1)^2 - 1^2}{1.1 - 1} = \frac{1.21 - 1}{0.1} = \frac{0.21}{0.1} = 2.1$.