解题方法
1 . 已知函数f(x)=x2+tx+1(其中实数t>0).
(1)已知实数x1,x2∈[﹣1,1],且x1<x2.若t=3,试比较x1f(x1)+x2f(x2)与x1f(x2)+x2f(x1)的大小关系,并证明你的结论;
(2)记g(x)
,若存在非负实数x1,x2,…xn+1,使g(x1)+g(x2)+…+g(xn)=g(xn+1)(n∈N*)成立,且n的最大值为8,求实数t的取值范围.
(1)已知实数x1,x2∈[﹣1,1],且x1<x2.若t=3,试比较x1f(x1)+x2f(x2)与x1f(x2)+x2f(x1)的大小关系,并证明你的结论;
(2)记g(x)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3959f20a5d27df3491dde38b665744.png)
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解题方法
2 . 已知
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证明:
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证明:
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![](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/0097ca400d4619a94c4282c1ef6ec68e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f9223bc24df8d429d743692fff7c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2373972e07f9b335211360a84fd45b2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f947be1f6c5a7fc23fe168e0c15777c.png)
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