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দৃশ্যকল্প: ( A= left[ begin array ccc 1 & 0 & 2 -2 & 2 & -2 -2 & 1 & -6 end array right], B=A^ -1 , C= left[ begin array c 3 -2 -7 end array right], X= left[ begin array l x y z en | Suva Ai