|b|<4, 如果是2|a|<4+b證明思路的副產品或其延伸,解才算完美。
否則,還要打個補丁。補丁雖小,但思路有斷點。
|b|<4, 如果是2|a|<4+b證明思路的副產品或其延伸,解才算完美。
否則,還要打個補丁。補丁雖小,但思路有斷點。
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標準答案。先證|b| < 4。
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06/21/2023 postreply
15:41:00
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