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In Delta ABC, Delta^2/(a^2+b^2+c^2) {1/r...

In `Delta ABC, Delta^2/(a^2+b^2+c^2) {1/r_1^2+1/r_2^2+1/r_3^2+1/r^2}=`

A

1

B

0

C

s

D

`Delta`

Text Solution

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The correct Answer is:
A
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