推 kusoayan :cauchy inequality 05/20 20:28
→ kusoayan :[(√x)^2 +(√y)^2] * [(1/2)^2 + (1)^2] .......(1) 05/20 20:29
→ kusoayan :(1/2*√x + √y )^2............................(2) 05/20 20:29
→ kusoayan :by cauchy inequality: (1) >= (2) 05/20 20:30
→ kusoayan :這樣應該就有了@@? 05/20 20:30
→ kusoayan :算出來答案是25? 05/20 20:30
→ b121106992 :X=100 Y=400 05/20 20:46