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If A is non- singular martix and `(A +l)(A-l) = 0` then `A A^(-1)` = …….A. 2AB. 0C. lD. 3l |
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Answer» Correct Answer - A We have , A is non-singular matrix `therefore" "|A| = 0` and `(A+l) (A -l) = 0` `rArr " "A^(2) - l^(2) = 0` `rArr " "A^(2) = l^(2) = l` `rArr " ""A.A = l rArr A^(-1)A` `therefore " "A + A^(-1) = A+A =2A` |
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