HOMEWORK ASSIGNMENT:

H$1.$ Evaluate $\underset{x-3^{-}}{lim}\frac{3}{x+3}$

H$2.$ Evaluate $\underset{x-3^{+}}{lim}\frac{3}{x+3}$

H$3.$ Evaluate $\underset{x{2}^{+}}{lim}\frac{4-x}{4-x^2}$

H$4.$ Evaluate $\underset{x(-\frac{}{2}{)}^{+}}{lim}tanx$