二项式
的展开式中,
项的系数是60,则
项的系数是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97e331d84f00eed9c8b61cb9c1fbe8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af9764aa29ce1378f9c6f6c3ceea928.png)
更新时间:2018-02-24 22:25:18
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适中
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【推荐1】若
,则二项式
的展开式中常数项为 ______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dee31d9c34367a1334115839f23f3af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e25fb145550443f5ce907c87db1f2a.png)
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【推荐2】设
,则
的展开式中常数项是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801009f427e0f6233c3eb9a51524ed7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512cf8a20a7ebc44387890dc5dca963.png)
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解题方法
【推荐1】已知正整数
,若
的展开式中不含x5的项,则n的值为_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcd23a8020d731bd512bb8df45ea594.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9dcc26dd602798eaa91e0b799457dc6.png)
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【推荐2】将多项式
分解因式得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff71257964cdbfd535af73143240bdf.png)
为常数,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74be0e395883f9cb867b4ab11e21080.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1435e881ed05c7b1280b47f3802adb05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff71257964cdbfd535af73143240bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb1d153bc13fc0c590a08a105e21ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74be0e395883f9cb867b4ab11e21080.png)
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