2024届湖南省长沙一中高三月考（三）数学试题及答案

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书面表达One possible version:NOTICEA sports meeting will be held in the playground of our school from next Thursday to FridayAs you know, the pressure of study is very heavy now, especially for those senior 3. So the purpose of the sports meeting is to letevery student get relaxed, as a result of which we students can live happily and heal thilyEveryone is welcome to take part in it. Those who perform excellently at the sports meeting will get prizes. But don' t take theresults so serously because taking part is more important than the result. Good luck to everyone!

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第二节16-20CEGFB

18解:(1)因为f(x)=1x2-alnx,其定义域为(0,∞)所以f""(x)=x-a(x>0),当a≤0时,f(x)>0,则f(x)在(0,十∞)上单调递增;当a>0时,f(x)=x-a=x“,所以当0
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