{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fa4.hateblo.jp%2Fentry%2F2018%2F11%2F09%2F220029\" title=\"\u7d30\u3044\u8f2a\u306e\u9762\u7a4d\u3068\u9577\u65b9\u5f62\u306e\u9762\u7a4d - A4\u306e\u5b87\u5b99\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"\u7d30\u3044\u8f2a\u306e\u9762\u7a4d\u3068\u9577\u65b9\u5f62\u306e\u9762\u7a4d","provider_url":"https://hatena.blog","blog_title":"A4\u306e\u5b87\u5b99","width":"100%","blog_url":"https://a4.hateblo.jp/","published":"2018-11-09 22:00:29","type":"rich","author_url":"https://blog.hatena.ne.jp/dai-ig/","categories":["\u6570\u5b66","\u5e7e\u4f55"],"provider_name":"Hatena Blog","version":"1.0","url":"https://a4.hateblo.jp/entry/2018/11/09/220029","image_url":"https://chart.apis.google.com/chart?cht=tx&chl=r%2Bdr","description":"\u7d30\u3044\u8f2a\u306e\u9762\u7a4d\u3092\u6c42\u3081\u305f\u3044\u3002 \u8f2a\u306f\u3001\u4e2d\u5fc3\u3092\u540c\u3058\u304f\u3059\u308b\u5927\u304d\u3044\u5186\u3068\u5c0f\u3055\u3044\u5186\u3068\u306b\u631f\u307e\u308c\u305f\u9818\u57df\u3068\u8a00\u3048\u308b\u306e\u3067\u3001\u5927\u304d\u3044\u5186\u306e\u534a\u5f84\u3092\u3001\u5c0f\u3055\u3044\u5186\u306e\u534a\u5f84\u3092\u3068\u3059\u308b\u3068\u3001\u9762\u7a4d\u306f\u4ee5\u4e0b\u306e\u5f0f\u3067\u8868\u305b\u308b\u3002 \\begin{equation}S=\\pi (r+dr)^2-\\pi r^2\\end{equation} \u5f0f\u3092\u5c55\u958b\u3059\u308b\u3002 \\begin{eqnarray} \\require{cancel}S&=&\\pi (\\cancel{r^2}+2rdr+dr^2)-\\cancel{\\pi r^2}\\end{eqnarray} \u3053\u3053\u3067\u8f2a\u304c\u7d30\u3044\u3053\u3068\u306f\u304c\u5c0f\u3055\u3044\u3053\u3068\u3068\u7b49\u4fa1\u3067\u3042\u308b\u3002\u3057\u304b\u3057\u3053\u306e\u6642\u3001\u306e\u9805\u306f\u3055\u3089\u306b\u5927\u5e45\u306b\u5c0f\u3055\u3044\u5024\u306b\u306a\u308b\u306e\u3067\u7121\u8996\u3067\u304d\u308b\u3002 \\beg\u2026","author_name":"dai-ig","height":"190"}