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দৃশ্যকল্প-১ : (i) ( a x^ 2 +b x+c=0 ) এবং (ii) ( a x^ 3 +b x^ 2 +c x+d=0 ; a, b, c, d in R ; a neq 0 ). দৃশ্যকল্প-২ : ( M=(-1+-3)^ n +(-1--3)^ n ). | Suva Ai