|b|<4, 如果是2|a|<4+b证明思路的副产品或其延伸,解才算完美。
否则,还要打个补丁。补丁虽小,但思路有断点。
|b|<4, 如果是2|a|<4+b证明思路的副产品或其延伸,解才算完美。
否则,还要打个补丁。补丁虽小,但思路有断点。
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标准答案。先证|b| < 4。
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06/21/2023 postreply
15:41:00
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