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`a ,b ,c` are positive real numbers forming a G.P. ILf `a x 62+2b x+c=0a n ddx^2+2e x+f=0` have a common root, then prove that `d//a ,e//b ,f//c` are

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`a ,b ,c` are positive real numbers forming a G.P. ILf `a x 62+2b x+c=0a n ddx^2+2e x+f=0` have a common root, then prove that `d//a ,e//b ,f//c` are in A.P.
A. A.P.
B. G.P
C. H.P.
D. none of these
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