4个杯子叠起来高
,6个杯子叠起来高
,n个杯子叠起来的高度可以表示为( )
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/20/d9e2fe3d-411a-4655-ba0f-6653467f8642.png?resizew=234)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe9f7abf7bcf4e1aa2579cd191d7761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8cc740f1c73ccff0db9e7f9b45bbd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/20/d9e2fe3d-411a-4655-ba0f-6653467f8642.png?resizew=234)
A.![]() | B.![]() | C.![]() | D.![]() |
2023七年级上·全国·专题练习 查看更多[2]
更新时间:2023-08-18 11:07:17
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【知识点】 用代数式表示数、图形的规律解读
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【推荐1】如图所示,2条直线相交只有1个交点,3条直线相交最多能有3个交点,4条直线相交最多能有6个交点,5条直线相交最多能有10个交点,……,
(
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A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】下列图形都是由同样大小的黑点按一定的规律组成,其中第①个图形中一共有4个黑点,第②个图形中一共有9个黑点,第③个图形中一共有14个黑点,…….则第⑩个图形中黑点的个数共有
![](https://img.xkw.com/dksih/QBM/2016/5/3/1574201703178240/1574201709002752/STEM/76532c4a8d9b4cab98547f5a9fff3ff4.png)
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A.48个 | B.49个 | C.52个 | D.54个 |
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