等号成立条件はa/b+b/a=2が成り立つときです。
この両辺をab倍して、
a^2+b^2=2ab⇔a^2-2ab+b^2=0
⇔(a-b)^2=0
よって、a=bのときとなります。
Mathematics
Senior High
(3)の等号が成り立つときの解説お願いします！
Il
る の 2は実数とし, の
証明せよ。(1) (3) は等号が)
⑪⑬) (*2+1(ア1と(*y二
(⑫⑳ V+2V5 >
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