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[函数] 2017年理科浙江卷第17题绝对值

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isee posted 2017-6-9 02:01 |Read mode

看得清吧，先减a，再加a.

把x+4/x换掉后，这就一正常的解不等式，a<=4.5

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2025-7-23 09:48 GMT+8

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