1. The problem statement, all variables and given/known data Prove that if A is an n x n diagonal matrix with nonzero main diagonal elements; that is a(subscript)ii≠0 for all 1 ≤ i ≤ n, then A is nonsingular and find A(superscript)-1 (A inverse) 2. Relevant equations AB=BA=I(subscript)n 3. The attempt at a solution I first started out by stating that givens, such as A is an n x n diagonal matrix with nonzero diagonal elements. I then let B be an n x n matrix, and also stated that B is the inverse of A. Am I on the right track here? Can I prove that AB=I(sub)n or BA=I(sub)n??