Minors and Cofactors

JEE Main Mathematics · Matrices and Determinants · 2 questions, latest first

• Let A=[a_i j]= [log_5 128, log_4 5; log_5 8, log_4 25]. If A_i j is the cofactor of a_i j, C_i j=Σ_k=1^2 a_i k A_j k, 1 ≤ i, j ≤…202529 January, Shift 1 · Q4
• Let α β ≠ 0 and A= [β, α, 3; α, α, β; -β, α, 2 α].If B= [3 α, -9, 3 α; -α, 7, -2 α; -2 α, 5, -2 β] is the matrix of cofactors of…20245 April, Shift 2 · Q5