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The exradii r(1), r(2), r(3) of triangle...

The exradii `r_(1), r_(2), r_(3)` of `triangleABC` are in H.P. then prove that a,b,c are in H.P.

A

A.P.

B

G.P.

C

H.P.

D

None of these

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The correct Answer is:
A
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