解题方法
1 . 已知实数
满足
,则
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a3299220942578df1791665058d5944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120f797efb5d64ce6f7e66d6591c604a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6745fa705dad174c271f5ebc7ab775.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知a,b,c为正实数,则代数式
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af070487f00b5706974e0f93c1e0bb81.png)
A.![]() | B.1 | C.![]() | D.![]() |
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解题方法
3 . 设非负实数
,
,
满足
,则
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a8cc6a2de01535008282cdc2339b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1433c8103033c67232f2f9ae189608d.png)
A.最小值为![]() | B.最小值为![]() |
C.最大值为![]() | D.最大值为![]() |
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解题方法
4 . 已知
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/938d320ca456580f2e4b6a5b36f91d19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef66c5988b5841f7a9e21a35019e3610.png)
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解题方法
5 . 已知正实数
满足
,求
,的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99bc8f020e80837253d72aa58cc6ede0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac91af7b4b67d918b7c40f28807398f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfcb7eaf03a27a7425edaa4cc9fa9405.png)
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解题方法
6 . 求函数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226bf8292d5258bb91079d5e5e91a3c6.png)
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解题方法
7 . 设
是两个单位向量,x,y是实数.若
与
的夹角是
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10814bc3db929e79874befe96cf4e3d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0411792b587ddd3e04440392f011c224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b95d660852c5226ff65a21cfb36b8b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b99d2d50d775c6f5ab9d47f7eaabcc23.png)
A.x的最大值为1 | B.x的最大值为![]() |
C.![]() ![]() | D.![]() ![]() |
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8 . 设
是满足
的非负实数,令
,则M的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb7349bda8dda92a996fb8cf20fba65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d32b749e96b19a8a21892fc14cba230f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42066280b0672cd05efabdeb934ac8d5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 若a,b,c为非负实数,且
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e06a3f153435bec68e441c25fe7667e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ae24688d4c45aad43e9af0b7bbfda6b.png)
A.3 | B.5 | C.7 | D.以上答案都不对 |
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10 . 若实数a,b,c,d满足
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6081579b3cd6d92372e9224487de894f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e9f11ccb484cbe2622baecdb7f0f325.png)
A.1 | B.2 | C.3 | D.以上答案都不对 |
您最近一年使用:0次