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...Girls high school and college prayagraj class b c mathematics worksheet no chapter matrices determinants note parents are expected to ensure that the student spends two days read understand topic according book or website referred thereafter answer questions isc for by op malhotra www khanacademy org topperlearning com any other relevant exercise i using properties of prove a bc cb ii ac ab ba abc iii bca cab iv x v square matrix is said be singular if det otherwise it non adjoint inverse transpose obtained replacing each element its cofactor in theorem let order n then adja ex find s cofactors elements given ij adj q value iof without finding hint adjab adjb show invertible there exists same such case we say written as every possesses unique proof an inverses ca now from hence iff conversely since therefore this formula th...