1. Define the limit of a function by using the concepts of existence and neighborhoods. 2-a) Find: lim (1 - x2) X-1 1-X 2-b) Find lim 2 + 1 X 7 00 (x + 1 ) `3. Find the price elasticity of the following nonlinear demand function: Q = ap-b Where Q is quantity demanded, p is the price of its own. (Show your work. This means that no work no credit.)