In triangle `ABC, 2b=a+c` .If `r_(1),r_(2),r_(3)` be the exradii of the triangle,then `(1)/(r_(1)),(1)/(r_(2))` and `(1)/(r_(3))` are in

In triangle ABC, if r_(1)=3,r_(2)=10,r_(3)=15 then c=

In triangle ABC, if rr_(1)=r_(2)r_(3), then the triangle is

In triangle ABC if r_(1)=3,r_(2)=10,r_(3)=15 then c=

If r_(1),r_(2)andr_(3) are exradii of any triangle , then r_(1)r_(2)+r_(2)r_(3)+r_(3)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

In triangle ABC, if r_(1)+r_(2)=3R and r_(2)+r_(3)=2R , then

If in a triangle ABC,r_(1)=2,r_(2)=3 and r_(3)=6 ,then b=

In any Delta ABC,r_(1),r_(2),r_(3),r stands for its usual meaning then (1)/(r_(1))+(1)/(r_(2))+(1)/(r_(3)) is

In triangle ABC, if r_(1) = 2r_(2) = 3r_(3) , then a : b is equal to