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.

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