20-21高一·江苏·课后作业
1 . 设a,b均为不等于1的正数,利用对数的换底公式,证明:
(1)
;
(2)
(
,
,
).
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c29f0abb27fb384bd21aaf1e771d19c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f095b5fe07c9a01c3ae6502814b03439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5a523e020e21797c0f83c2b6772588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b2400d72b1e3145cb21ba719d8a968.png)
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20-21高一·江苏·课后作业
2 . 证明:
,其中
,
,
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de037b169136d835516891005282de81.png)
![](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/a2a891d21bb2c7a11304beaab5054074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f940e491269e04ab4680ee10714ba88c.png)
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3 . 证明:当
,
时,
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d347fa1c09e08e29937e64dae5f47eb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128731d0292579ae9f97f83bc1eab551.png)
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20-21高一·上海·假期作业
4 . 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e31bdbc43306583cb74d4c3801ac2e.png)
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20-21高一·江苏·课后作业
5 . 已知
,
,
,
.
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1353fecc9cb8b23406534eed37b4f48d.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b9237e0cb71a3b7c1ee3dd87eefcbf.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7981e3621e92f70b24ae9ef2f1bfcf.png)
__________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d29c5884e25447be6c0b976a2b9cbb4.png)
__________ ,一般地,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/251d4c8a06fcf86ae7444def9bbcfa84.png)
__________ ,
(2)证明:
.
![](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/a2a891d21bb2c7a11304beaab5054074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1353fecc9cb8b23406534eed37b4f48d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b9237e0cb71a3b7c1ee3dd87eefcbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7981e3621e92f70b24ae9ef2f1bfcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d29c5884e25447be6c0b976a2b9cbb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/251d4c8a06fcf86ae7444def9bbcfa84.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e763009996df0a623943c143387dd0.png)
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2021高一·上海·专题练习
6 . 已知一元二次方程ax2+bx+c=0(a≠0)的两实根为x1、x2,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7974c52f0ce397f9c4db2da5d13237ee.png)
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20-21高一·江苏·课后作业
7 . 证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07eeb508ed4441cf62f373a0760bb770.png)
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2021高一·上海·专题练习
8 . 已知
,判断函数
的单调性并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c34d64a7bea0629324b9105d94556ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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20-21高一上·全国·课后作业
9 . 已知函数f(x)=
,证明函数在(-2,+∞)上单调递增.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de31811b15314a4de779e7f145add745.png)
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2021-04-17更新
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2197次组卷
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5卷引用:3.2.1.1 函数的单调性(课时作业)-2020-2021学年上学期高一数学同步精品课堂(新教材人教版必修第一册)
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2021高一·上海·专题练习
解题方法
10 . 已知:
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90119c3ce03e145b4ab6f58360aefd02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b0225ea5fd56bb8f54873a96e85ac2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e5bf666b582ea7081d66162cac8a8e.png)
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