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দৃশ্যকল্প-১: (z=3 x+4 y ) শর্তসমূহ: (x+y leq 450 ) (2 x+y leq 600 ) (y leq 400 ) (x, y geq 0 ) দৃশ্যকল্প-২ : (y^ 2 +y+1=0 ) | Suva Ai