阅读以下材料,完成相关的填空和计算.
(1)根据倒数的定义我们知道,若
则
=______.
(2)计算:
;
(3)根据以上信息可知:
______.
(1)根据倒数的定义我们知道,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced40054e1c712d044a2342545ae87d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598d2aae792ad854d5cce9129dc14080.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/753d847d13d23ab2e6233cf2ddd10a41.png)
(3)根据以上信息可知:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c958416e80f963e612413d6c49da209.png)
更新时间:2023-12-09 08:49:06
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【推荐2】已知多项式
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【推荐1】计算:32×(-
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【推荐2】直接写得数
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838e74bc274360d9894a3f0d94a6ee42.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804d975323d3bdabd7e5197d097c3931.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a4d2b18053b02322916bf61f1b83449.png)
(4)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7145ea5c7d37a47ab3c1897728daef.png)
(5)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb42e55b9636dda898f1da753849af5.png)
(6)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39ec178a923ab73b280ebe0f08832ce.png)
(7)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53db18e8b31a1ced6c3cadabc233ea8.png)
(8)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e33669f1ad03a50ef8e9b6b7e7643e.png)
(9)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5e75f212d2582ba928f47c01576aac.png)
(10)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79cd7279e01a9f0282acdce19942d5d3.png)
(11)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e2c713b0c63abcfae97d8b4930f211.png)
(12)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f020a40ade7fdec90b6b85c501eab3a.png)
(13)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79897b64345a07e85e877e11a8e7fa82.png)
(14)
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(2)
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(3)
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(4)
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(5)
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(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39ec178a923ab73b280ebe0f08832ce.png)
(7)
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(8)
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(9)
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(10)
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(11)
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【推荐1】钟面上有1,2,3,…,11,12共12个数字,如图所示.
![](https://img.xkw.com/dksih/QBM/2020/8/4/2520632805326848/2521343333490688/STEM/69a3cacf1fb84e46a72de17f2cd0ad8a.png?resizew=156)
(1)试在某些数的前面添“-”号,使钟面上的数字之和为0.
(2)能否改变钟面上的数,比如只剩下6个奇数,仍按第(1)小题的要求做?如果可以,请写出来;如果不行,说明理由.
(3)若钟面上只剩下6个偶数,能否仍按第(1)小题的要求做?说明理由.
![](https://img.xkw.com/dksih/QBM/2020/8/4/2520632805326848/2521343333490688/STEM/69a3cacf1fb84e46a72de17f2cd0ad8a.png?resizew=156)
(1)试在某些数的前面添“-”号,使钟面上的数字之和为0.
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【推荐2】请先阅读下列一组内容,然后解答问题:
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所以:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef72ba2f44e11a3226f4b1db7ea6ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7de4b07e025f7323fc980359bc5f59.png)
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解答下面的问题:
(1)若n为正整数,请你猜想
= ;
(2)利用你的结论求:
+
+
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因为:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a408549e1e1e60325cfc33406d08e45.png)
所以:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eef72ba2f44e11a3226f4b1db7ea6ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7de4b07e025f7323fc980359bc5f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b0fe842800e3e6a05d54ee3884fdc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ef8d386b3af1309841ae09818cd4d7.png)
解答下面的问题:
(1)若n为正整数,请你猜想
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7928cc7a6ebf95b2928289d3350960f2.png)
(2)利用你的结论求:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ed98e34b84285163a8b1b45c6fe403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231fd0fbb933002c6a527dcc4f7186f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4a646b098601ebe77beadf1707deca.png)
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