奧數題5

in #partiko6 years ago (edited)

看到他做出來了一道奧數題,我第一個反應是他式子列的雜亂無章,到時候不容易分步給分;第二個反應是這本書肯定編制得太早了,不符合現在要求的難度,當然這句話沒有告訴他。不過他沒有在意,嗯嗯地接受了建議然後玩槍去了。

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