4. [4 points Compute the 4 terms (after an) of the sequence: an = 3an-1 + 2, n 2 1, given that do = 1. 5. [4 points Consider the sequence an = n, n 2 1. (10) (11) (a) Find the sum of the first 10 terms of the sequence. Is your answer the same as ? 2 (b) Check the following statement using n = 5 and n = 13: ( n ) (n + 1 ) 2 6. [4 points] Consider the sequence an = n', n > 1