发布时间 : 星期二 文章2017骞村北涓滅渷娴庡崡甯傞珮鑰冩暟瀛︿簩妯¤瘯鍗峰強鍙傝�冪瓟妗?鐞嗙) - 鐧惧害鏂囧簱更新完毕开始阅读95f76c5ca48da0116c175f0e7cd184254a351b0e
调递增．
∴G（t）＞G（1）＝0，即ln﹣2＞0，
又因为x2﹣x1＞0，∴
＞f′（）．
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BaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiu BaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiu BaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiu BaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiu BaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiuBaidubaidubaidubaidubadiubadiu
第22页（共22页）