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सिद्ध कीजिए कि |{:(1+a,1,1),(1,1+b,1),...

सिद्ध कीजिए कि
`|{:(1+a,1,1),(1,1+b,1),(1,1,1+c):}|=abc ((1)/(a)+(1)/(b)+(1)/(c)+1).`

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