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- lim y approaches 0 ................... [5y3 + 8y2]/[3y4 - 16y2]1. For what value (s) of x is the function f(x) = 4/2x2 - 6x not continous? 2. If the demand of firm is QD (p) = 50 -3p and its supply function is Qs (p) = 14 + 6p. What is the equilibrium? 3. Find Lim x2 -4x + 3/5lim h--->0 (f(2+h)-f(2)) / h , where f(x)=4x+8