已知a>0,函数f(x)=
在区间[1,4]上的最大值等于
,则a的值为
![](https://img.xkw.com/dksih/QBM/2016/3/15/1572540417859584/1572540423438336/STEM/8bab795a92144cb3b4510bc7896f948c.png)
![](https://img.xkw.com/dksih/QBM/2016/3/15/1572540417859584/1572540423438336/STEM/eb60bf68ed9342318e6de5b039f0ab3d.png)
A.![]() ![]() | B.![]() | C.2 | D.![]() |
更新时间:2016-12-04 04:04:35
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【知识点】 根据函数的最值求参数
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【推荐2】已知函数
,
,若对任意
,总存在
,使得
成立,则实数
的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd503e0be1bb4ee6d6fbf0720b8987f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677a4996b9111053bdd6d62b99487ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14b86bd08c6f0651e1fab87f260abca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/312d22e2a001b2948b206c021dd11ac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8009c0c16d79096b36620015ce4d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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