JEE Main 20208 Jan, Morning shiftMathematicsMediumMatrices and Determinants245× since 2002
The number of all 3 × 3 matrices A, with
enteries from the set {–1, 0, 1} such that the sum
of the diagonal elements of AA^T is 3, is
JEE Main 2020 · 8 Jan, Morning shift · Q30