If A=bmatrix x & 2 4 & 3 bmatrix and A ^-1=bmatrix 18 & -1 12 -1 6& 4 9 bmatrix , then find the value of x?
Applying the basic concept, solving fully: apply relevant formula, put numbers, compute. Result comes as 32 3. Easy verification shows it satisfies condition.
Ref: NCERT Mathematics Class XII — Matrices and Determinants
