Calculus

    I. Evaluate the following limit. In this question you must use the change of variable method; explain why you cannot rationalize the numerator. lim -ific 4 'a" 77-71 Let 437 be IA u IA Ltm -26( --)4 ty)fr, -,R —se -- Y-41, A kir _ /941 04-)) 0'4) "X'") ta-))(01-1141Y) _ ISH (41)) trj" V I )(-:Olf (6%1+7144v) r.41.41 'r I ) 3 !. Explain what the derivative of a function represents. Illustrate two situations in which a function does not have a derivative at x = 2. Explain why there cannot be a derivative at x ci 2. uld / rt.