If \[a,b,c\] are in G.P., then the equations \[a{{x}^{2}}+2bx+c=0\] and \[d{{x}^{2}}+2ex+f=0\] have a common root if \[\frac{d}{a},\frac{e}{b},\frac{f}{c}\] are in [IIT 1985; Pb. CET 2000; DCE 2000]

If \[a,b,c\] are in G.P., then the equations \[a{{x}^{2}}+2bx+c=0\] an

1.	If \[a,b,c\] are in G.P., then the equations \[a{{x}^{2}}+2bx+c=0\] and \[d{{x}^{2}}+2ex+f=0\] have a common root if \[\frac{d}{a},\frac{e}{b},\frac{f}{c}\] are in [IIT 1985; Pb. CET 2000; DCE 2000]
A.	A.P.
B.	G.P.
C.	H.P.
D.	None of these
Answer» B. G.P.