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If a,b,c, be the pth, qth and rth terms ...

If a,b,c, be the pth, qth and rth terms respectivley of a G.P., then the equation `a^q b^r c^p x^2 +pqrx+a^r b^-p c^q=0` has (A) both roots zero (B) at least one root zero (C) no root zero (D) both roots unilty

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