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Let a,b,c be positive real numers such t...

Let a,b,c be positive real numers such that `bx^2+(sqrt(((a+c)^2+4b^2))x +(a+c),=0, AA x epsilon R, then` a,b,c are in (A) G.P. (B) A.P. (C) H.P. (D) none of these

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