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导数

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yhrenwoxing posted 2018-1-3 23:41 |Read mode
Last edited by yhrenwoxing 2018-1-3 23:50这个题要数学
结合吗
IMG_20180103_234834.jpg

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kuing posted 2018-1-4 00:00
注意对称性

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游客 posted 2018-1-4 08:11
函数f(x)的图象关于直线x=1对称。这个题跟那个“双曲线”题一样,是唬人的。

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original poster yhrenwoxing posted 2018-1-4 10:43
Last edited by yhrenwoxing 2018-1-4 10:55回复 2# kuing
可证当x>=1是 f(x)单调递增
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游客 posted 2018-1-4 11:02
回复 4# yhrenwoxing


    当a=1时,函数图象在对称轴两侧也是单调的,但是题目说了a<0的。
你要验证题目有没有出错,那就直接作图去看看好了。
y=f(x+1)是偶函数,这个最多算个图象平移问题。

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