Epsilon delta proofs 7 - Functions involving square roots

In this video we demonstrate how to prove limits using the epsilon-delta definition if the functions we are considering involve square roots or other fractional powers. We do three examples:
lim_(x to 4) root(x) = 2 proved at 0:20
lim_(x to -2) root(x^2+5) = 3 proved at 7:00
lim_(x to 8) x^(2/3) = 4 proved at 13:50