已知
展开式中,
的系数是280,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316b1d251c7ce75910d0e56698c31d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3336c8ed5361c10c37300e41e03f9f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
2019·河北·模拟预测 查看更多[1]
(已下线)河北省中等职业学校对口升学考试全真模拟冲刺卷数学试题十七
更新时间:2019-03-23 08:19:37
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【推荐1】若
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填空题-单空题
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较易
(0.85)
名校
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【推荐2】已知
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___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b9d041df054ebf5d44b699ba334593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
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