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Before finding the inverse of a matrix, we first define its:
ATranspose
BTrace sum
CAdjoint
DDiagonal
Answer & Solution
Correct answer: C. Adjoint
1. The inverse formula needs another matrix built from cofactors.
2. That matrix is defined first.
3. It is the adjoint of the matrix.
4. So the answer is the adjoint.
_Source: NCERT Class 12 Mathematics, Ch 4 'Determinants'_
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