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[" 25.The sum of the first "p" ,q,"r" te...

[" 25.The sum of the first "p" ,q,"r" terms of an "A" .P.are "a" ,"b" ,"c" respectively.Show that "],[qquad (a)/(p)(q-r)+(b)/(q)(r-p)+(c)/(r)(p-q)=0]quad " (BTE.Delhi 2016) "

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