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सरणिको के गुणों का प्रयोग करके सिद्ध कीज...

सरणिको के गुणों का प्रयोग करके सिद्ध कीजिएः की `|{:(,x,x+y,x+2y),(,x+2y,x,x+y),(,x+y,x+2y,x):}|=9y^(2)(x+y)`

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