Problem 14.6. Find a closed form for each of the following sums: "mcs" - 2018/6/6 - 13:43 - page 639 - #647 14.7. Asymptotic Notation (a) i=1n(i+20121i+20131)14.7. Asymptotic Notation 639 (a) i =1n(i+20121i+20131) (b) Assuming the following sum equals a polynomial in n, find the polynomial. Then verify by induction that the sum equals the polynomial you find. i=1ni3.