\( a, b, c \) are in \( G P \). then the equations \( a x^{2}+2 b x+c=0 \) and \( d x^{2}+2 e x+... VIDEO
\( a, b, c \) are in \( G P \). then the equations \( a x^{2}+2 b x+c=0 \) and \( d x^{2}+2 e x+f=0 \) have a common root if \( \frac{d}{a}, \frac{e}{b},- \)
(A) A.
(B) G.P.
(C) H.P.
(D) none of these
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