08/07/02 21:18:08
〔問題〕は↓でつ･･･
B.4040.
a,b,c are positive real numbers, and ab+bc+ca=1. Prove that
(1-a^2)/(1+a^2) + (1-b^2)/(1+b^2) + (1-c^2)/(1+c^2) ≦ 3/2.
08/07/02 21:18:08
〔問題〕は↓でつ･･･
B.4040.
a,b,c are positive real numbers, and ab+bc+ca=1. Prove that
(1-a^2)/(1+a^2) + (1-b^2)/(1+b^2) + (1-c^2)/(1+c^2) ≦ 3/2.