(1)已知
,试用
表示
.
(2)若
,
分别是方程
的两个实根,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b003c794666d6c4523d3081f6d0914b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f239b96658ab017dcff1ac903a54d6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34b1a53c70121cf6760c64e77be7269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075b4e7cebfd428d890849b35ab566fd.png)
更新时间:2021-12-24 17:12:52
|
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】求满足下列条件的x的值:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0441a354e04bd202b96d2248a28533f4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4fb37562754423e32ac06ee3298db04.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a5f40bf14a1579ee6521224a9472f5.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b58ff9235f90747743b626d08b5dc8.png)
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解答题-计算题
|
适中
(0.65)
【推荐2】求值:
(1)
;
(2)(log2125+log425+log85)(log52+log254+log1258).
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249b0e9e75829dc325134c5c9701dcd8.png)
(2)(log2125+log425+log85)(log52+log254+log1258).
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7789f1f2fc1862a5a766761cf2ee45.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ad746c70da129b2cc98a7e1944a4cfb.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐3】立德中学高一数学兴趣小组利用每周五开展课外探究拓展活动,在最近的一次活动中,他们定义一种新运算“
”:
,
,通过进一步探究,发现该运算有许多优美的性质:如
,
等等.
(1)对任意实数
,请判断
是否成立?若成立请证明,若不成立,请举反例说明;
(2)已知函数
,函数
,若对任意的
,存在
,使得
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3c2f679d53b91088ba6eb14c16cbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e5060d9b229d6cfc8b21ecb5549d17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64541d7f445079207b6f671adc7d662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347604752750649bde7b37c456c8263d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48c46a883a70c6ca89d9877ed4894bc5.png)
(1)对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee069136ee60c3983c957ba0961f912.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6051ffc0e9ae07f6dd5e8a825c02b97b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/103d9319c355a06e10c118088dac5991.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12965bbc260bdbb0df0a110e59fb8d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bf60c5e8996d138198fe74f30ce520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e5987e76a34012a8bd0d51da0fddd83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】(1)已知正实数
,
满足
,求
的最小值,并求出此时
,
的值.
(2)已知
,
,试用
,
表示
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f7266b2ef457b8ddeee3fa2cc24022e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a08a2a5540efcdb5a77aa4ea3049884.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850df3e299d9b1ecbda7e3a59e2a255e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8d30454d91131d81366bacbc6ac58d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4c350fce4005b7740558ca348d1506.png)
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