Q7.8 1 Point Let A = {n Z-1 1}. Select all of the following statements that are true. D ACB (1,-1) = A x B. AB=BX A. A x B= {(m,n) ZXZ m +n 1 (3k - 2) n(3n - 1) 2 k=1 Do this by filling in the spaces below. Base case in = 1). Claim: El=1 (3k - 2) = 31 Proof of the claim: Enter your answer here<>