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If pth, qth, and rth terms of an A.P. ar...

If pth, qth, and rth terms of an A.P. are `a ,b ,c ,` respectively, then show that `(1) a(q-r)+b(r-p)+c(p-q)=0` `(2)(a-b)r+(b-c)p+(c-a)q=0`

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