If a,b,c, are in g.P then the equation ax2 + 2bx + c =0 and dx2 + 2ex + f =0 have a common root then
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ax2+2bx+x=0
dx2+2ex+f=0
let a=1
b=1 ,c=1,d=1,e=1
1x2+2×1x+x=0
1x2+2×1x+y=0
1x2+2x+y=0
1x2+2x+x=0
=2x4+4x=x+y
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