How do you do these problems. I was stuck please don't mind my work. Please give details on how you solve them.

3.Let sn denote the nth partial sum of the following given series. That is, Sn = > ak. k = ko I. Find the least integer n such that sn approximates the series with error less than 0.01. II. Give the approximated value of the series for this n. Rn) = 1 5- Sp 18 (a) ( = 1) * + 1 K2k ( - 1 )* +141 k = 1 (K +1) 2 160 7 100 4 ( * + 1 ) - 14 ( K ) ( K + 1 ) ( - 1 ) k k L L ( k + 1 ) ! 100 k = 2 (K+ 1 ) ! (+ /+ 1 ) ! 97 10 0 ( K + 1 )