Q31. If A is a 3 × 3 non-singular matrix such that AAT = ATA and B = A-1AT, then what is the value of the expression BBT?Mathematics — Matrices and Determinants — Question 31 of 98A. I + BB. IC. B-1D. (B-1)TPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →