If aᵢⱼ and Aᵢⱼ represent the (ij)th element and its cofactor of [2 -3 5; 6 0 4; 1 5 -7] respectively, then the value of a₁₁ A₂₁ + a₁₂ A₂₂ + a₁₃ A₂₃ is :

Question

MCQ (Single)Cofactor of an Element in DeterminantCBSE PYQ

The value of the cofactor of the element of second row and third column in the matrix [4 3 2; 2 −1 0; 1 2 3] is :

If A = [aij] = [[2, -1, 5], [1, 3, 2], [5, 0, 4]] and cij is the cofactor of element aij, then the value of a21 · c11 + a22 · c12 + a23 · c13 is :