こんにちは。相城です。
今回は中学校の数学では必須の分母の有理化をやってみましょう。
問題 次の分母を有理化しなさい。
例
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
![](https://www.mathtext.info/blog/wordpress/wp-content/uploads/2020/02/1yohaku.png)
答え
(1) ![Rendered by QuickLaTeX.com \dfrac{3\sqrt2}{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-60a8261f0876186819deccd1c6c6e379_l3.png)
(2)![Rendered by QuickLaTeX.com \dfrac{\sqrt5}{5}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-f5c12cae3465e9774e44bf56c30cb631_l3.png)
(3)![Rendered by QuickLaTeX.com \sqrt{3}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-6ad456fb5411d3588e53b4817bea43dc_l3.png)
(4)![Rendered by QuickLaTeX.com -\dfrac{\sqrt{6}}{3}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-5d602a7b730d3becf727f99c73d1d013_l3.png)
(5)![Rendered by QuickLaTeX.com -\dfrac{\sqrt{10}}{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-929207b5f82b5634dfe340e7f41b5501_l3.png)
(6)![Rendered by QuickLaTeX.com \dfrac{\sqrt{30}}{5}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-eee1dd65fc1ba9c34beb280aa187094a_l3.png)
(7)![Rendered by QuickLaTeX.com \dfrac{3\sqrt{2}}{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-df8a1992187d3180d0fa5513823befff_l3.png)
(8)![Rendered by QuickLaTeX.com -\dfrac{\sqrt2}{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-3c4f4a6a0a9e6aa9014f3ea145115dda_l3.png)
(9)![Rendered by QuickLaTeX.com \sqrt{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-f11810c1dda7d458d1e2a4c07193b389_l3.png)
(10)![Rendered by QuickLaTeX.com \dfrac{\sqrt{2}}{6}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-b10133d06436ff3537f58efec1feadb5_l3.png)
![Rendered by QuickLaTeX.com \dfrac{3\sqrt2}{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-60a8261f0876186819deccd1c6c6e379_l3.png)
(2)
![Rendered by QuickLaTeX.com \dfrac{\sqrt5}{5}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-f5c12cae3465e9774e44bf56c30cb631_l3.png)
(3)
![Rendered by QuickLaTeX.com \sqrt{3}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-6ad456fb5411d3588e53b4817bea43dc_l3.png)
(4)
![Rendered by QuickLaTeX.com -\dfrac{\sqrt{6}}{3}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-5d602a7b730d3becf727f99c73d1d013_l3.png)
(5)
![Rendered by QuickLaTeX.com -\dfrac{\sqrt{10}}{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-929207b5f82b5634dfe340e7f41b5501_l3.png)
(6)
![Rendered by QuickLaTeX.com \dfrac{\sqrt{30}}{5}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-eee1dd65fc1ba9c34beb280aa187094a_l3.png)
(7)
![Rendered by QuickLaTeX.com \dfrac{3\sqrt{2}}{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-df8a1992187d3180d0fa5513823befff_l3.png)
(8)
![Rendered by QuickLaTeX.com -\dfrac{\sqrt2}{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-3c4f4a6a0a9e6aa9014f3ea145115dda_l3.png)
(9)
![Rendered by QuickLaTeX.com \sqrt{2}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-f11810c1dda7d458d1e2a4c07193b389_l3.png)
(10)
![Rendered by QuickLaTeX.com \dfrac{\sqrt{2}}{6}](https://mathtext.info/blog/wordpress/wp-content/ql-cache/quicklatex.com-b10133d06436ff3537f58efec1feadb5_l3.png)
こんにちは。相城です。
今回は中学校の数学では必須の分母の有理化をやってみましょう。
問題 次の分母を有理化しなさい。
例
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)