Thank you, I just back home, 亂彈is senior Mathematician

來源: jinjing 於 2010-09-09 19:32:06 [檔案] [舊帖] [給我悄悄話] 本文已被閱讀：次 (135 bytes)

回答: A question in Bazaraa's book 由 guest1000 於 2010-09-09 13:04:56

He got it. I only explain his last inequality.We draw two lines from (x,g(x)) to (y,g(y))and (x,h(x)) to (y,h(y))...easy to get answer.

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