我们知道,任何一个正实数N可以表示成
(
,
),此时
(
).当
时,N是
位数.
(1)试用上述方法,判断
是多少位数(
);
(2)当
时,你有怎样的结论?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f60a6c27065c93f649915f459bd2ab65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d31e73155193dcdf7b36c22679954b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf910f82c3094b267a3d481d23d829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b277bc2867a0a4672b28fdc6fa36ad54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3dddda81c76b6abb6ba040f6bde5494.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
(1)试用上述方法,判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a90f7abe619aab652d6fd2531f77b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282724a3b2b45f1966a91389fdcedfcf.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3838d126e7480e3e0827999f3cf9f771.png)
20-21高一·江苏·课后作业 查看更多[3]
更新时间:2021-10-30 21:51:09
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解答题-问答题
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适中
(0.65)
名校
【推荐1】已知
且
,函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e61e35546276b60bd1c2d920b7f1d66.png)
(1)若
,解方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11da2f04f58da5da178ad6a012ff6b5e.png)
(2)设函数
,若
在
上单调递增,求
的取值范围
(3)若方程
在
上至少有一个零点,求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e61e35546276b60bd1c2d920b7f1d66.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11da2f04f58da5da178ad6a012ff6b5e.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187e4e3e13777f886f5fb4fa04006dbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7242b2ab643f9470da77e29d043b893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e44284cb19805a584880a686ac3df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589ed49839c4dc0b033431d88a4c1f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
|
适中
(0.65)
名校
【推荐2】已知函数
=logax,
=loga(2x+m
2),其中x∈[1,3],a>0且a≠1,m∈R.
(1)若m=6且函数F
=
+
的最大值为2,求实数a的值.
(2)当a>1时,不等式
<2
在x∈[1,3]时有解,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
(1)若m=6且函数F
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0838b3fea2e2f365b9c0deab6a9678ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)当a>1时,不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
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