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In triangleABC, if r(1)=2r(2) = 3r(3), t...

In `triangleABC`, if `r_(1)=2r_(2) = 3r_(3)`, then

A

`a/b=5/4`

B

`a/b=3/5`

C

`a/c=7/4`

D

`c/a=4/9`

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