ders no such shortcut as far as i kno . but as for me i did practise a lot of such questions to get used to dem n now i don waste much tym on fynding dem. n a shortcut which infollow fr competteive exms is frst go thruough the problem and fynd the determinant if its zero then inverse dosent exist n if its non zero then multiply the given matrix with the options and divide the resultant with the determinant of the one in the question if answr is one den dat option is the correct one. n rate me.
Moderation Team
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