. 1 . 0 a.) Express the funotlon f (as) : 2 as a power series 2 at; (if: + 2)k 37 1:20 When is the offer valid? Compute f(2) , f' (2) a f(4) (_2) and f(21) (_2) b.) Determine the interval of convergence of the power series 2 # . In this case, we denote k=0 4 00 k _ ("7 _1)2 , (4) (21) s (cc) Z . Compute f (2) , f (2) , f (72) and f (72)