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In a triangle ABC Let BC=a, CA=b, AB=c a...

In a triangle ABC Let `BC=a, CA=b, AB=c` and `r_(1), r_(2)`&`r_(3)` be the radii of ex-circles opposite to vertices `A B&C` respectively. If `r_(1)=2r_(2)=2r_(3)` then `3(a/b)= `

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