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In DeltaABC, the inradius and exradii ar...

In `DeltaABC`, the inradius and exradii are `r,r_(1),r_(2)` and `r_(3)` respectively. Then `r.r_(1)r_(2)r_(3)` equals

A

`Delta^(2)`

B

`2Delta`

C

`(abc)/(4R)`

D

None of these

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A
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MODERN PUBLICATION-SOLUTION OF TRIANGLES-Level-II
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