m Use identities M k = [m(m + 1)] and k=1 m [m(m + 1)(2m + 1)] to prove k=104-8 (0 points) Prove that 211 4 2 {(f +1): 3 [n(n +1)(2n + 1)] by i=1 each of the following two methods: By mathematical induction on positive integer n 2 1. 4- Drag and drop an image or PDF file or click to browse... Q4b (0 points) Prove that 211 4 2 m0 +1): 5 [1101 + l)(2n + 1)] by i=1 each of the following two methods: By using the identities mentioned in part (b) of question 3