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(1/r+1/r1+1/r2+1/r3)^2=4/r(1/r1+1/r2+1/r...

`(1/r+1/r_1+1/r_2+1/r_3)^2=4/r(1/r_1+1/r_2+1/r_3)`

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In triangleABC , If r_(1), r_(2), r_(3) are exradii opposites to angles A,B and C respectively. Then (1/r_(1) +1/r_(2)) (1/r_(2)+1/r_(3)) (1/r_(3)+1/r_(1)) is equal to

In triangleABC , If r_(1), r_(2), r_(3) are exradii opposites to angles A,B and C respectively. Then (1/r_(1) +1/r_(2)) (1/r_(2)+1/r_(3)) (1/r_(3)+1/r_(1)) is equal to

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