If = vmatrix a & b & c d & e & f g & h & i vmatrix and A, B, C, D, G are the cofactors of the elements a, b, c, d, g respectively, then what is bB+cC-dD-gG equal to?

NDA 2025 Mathematics question

Δ=

and are the cofactors of the elements respectively, then what is bB+cC-dD-gG equal to?

Answer: (A)

Expanding along the first row: aA+bB+cC = \Delta \Rightarrow bB+cC = \Delta - aA. Expanding along the

Create a free account to read the complete working, and practise questions like this in a timed test.

Question ID VK-030019