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22-23高二下·江苏南通·期中 查看更多[3]
更新时间:2023-09-12 09:12:22
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【推荐1】二项式
的展开式中,第3项的系数是____________ .
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【推荐2】已知多项式
,若
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________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63bdaec4fbaf1cd2facfdf932dbac17d.png)
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