r = ab / (a+b+c) ab = r *(a+b+c) ab = ra+rb +rc ab – rb = ra + rc b ( a- r) = ra + rc b = (ra +rc) / a – r значит,b = r*(a +c) / (a – r)
r = ab / (a+b+c)
ab = r *(a+b+c)
ab = ra+rb +rc
ab – rb = ra + rc
b ( a- r) = ra + rc
b = (ra +rc) / a – r
значит,b = r*(a +c) / (a – r)