Mathematics · essential
Inverse by adjoint formula for JEE
Adjoint and inverse of a square matrix
Formula
\(A^{-1}=\dfrac{1}{\det(A)}\operatorname{adj}(A)\).
Variables: \(A^{-1}\): inverse of \(A\).
Conditions: Exists only if \(\det(A)\ne 0\).
Finding inverse of 2x2 and 3x3 matrices.