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सिद्ध किजिये कि |{:(2y,y-z-x,2y),(2z,2z,...

सिद्ध किजिये कि `|{:(2y,y-z-x,2y),(2z,2z,z-x-y),(x-y-z,2x,2x):}|=(x+y+z)^(3)`

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