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सारणिकों के गुणधर्मो का प्रयोग करके प्रश...

सारणिकों के गुणधर्मो का प्रयोग करके प्रश्न 6 से 14 तक को सिद्ध कीजिए:
`(i) |{:(x+4,2x,2x),(2x,x+4,2x),(2x,2x,x+4):}|=(5x+4)(4-x)^(2)`
(ii) `|{:(y+k,y,y),(y,y+k,y),(y,y,y+k):}|=k^(2)(3y+k)`

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