已知向量
.
(1)若
,求
的值;
(2)求函数
的单调递减区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b1719a12eec509a4365b7c0a011346.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fca0ed4d765007d0957fd85377f2cc43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff3cb7137bd3bdbaa12a3a09c09816c.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a56b1f745a78c71ddfbb44837231c5.png)
更新时间:2019-06-05 23:28:32
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解题方法
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac75f9178a439cab2bdd96d2ede77f9.png)
(1)求f(x)的单调递增区间;
(2)求f(x)在闭区间
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(1)求f(x)的单调递增区间;
(2)求f(x)在闭区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4377601d0e101a1ddf80ad52ce6018a.png)
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【推荐2】已知向量
.
(1)设
,求
在
上的减区间;
(2)若
,向量
与
共线,且x为第二象限角,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a4b1b6c821466c7d5b7dffb4763c3f.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02669c4b39f9a4e148f4abbe2ce9b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3aae9c8988f4a48db69cad3308942c9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e64d854922db44d182841981562f5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737d61df8bcff0b4e75d7084e75f23ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058d8811c63e7a402a329b9b3c9e39c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f6b141026558558fe73e16f904969e.png)
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适中
(0.65)
解题方法
【推荐1】已知函数
.
(1)求
的值;
(2)求函数
的单调递增区间;
(3)若函数
在区间
上有且只有两个零点,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c4c08e4e4d58e014f3cb6887e99954.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b87f4ef298bdeebf59a0d850aff72c.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbae0d22d931ac42b565c7990764a2c1.png)
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【推荐2】在①
,②
,③
这三个条件中任选一个,补充在下面的问题中,并解答问题:
在
中,内角
的对边分别为
,且满足_______________.
(1)求角
的值;
(2)若
的面积为
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在边
上,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310e2dcd183b06532f8274d4ca64e45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4680450786914f54bde2581cdbe16a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04b82e15370e5561df0fa86adf81937.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604d037b88148502a5608e0285c76f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50196d293a863fe2f9e46199052ab8c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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【推荐3】在
中,内角
所对的边分别是
,
,
,已知
.
(1)若
,且
为锐角三角形,求
的周长的取值范围;
(2)若
,且外接圆半径为2,圆心为
,
为圆
上的一动点,试求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20be9adeb5574fdd3d975f053062887c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/988b7e964e313579ab8869d67d5be007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59880e470359d8e9faf6ae5ce155cf2a.png)
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