{"author_url":"https://blog.hatena.ne.jp/Pulin/","type":"rich","provider_name":"Hatena Blog","version":"1.0","blog_title":"\u5fa1\u5149\u5802\u4e16\u754c~Pulin\u306e\u65e5\u8a18","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fpulin.hateblo.jp%2Fentry%2F20170402%2F1491138199\" title=\"\u5168\u5fae\u5206\u306e2\u968e\u306e\u5834\u5408 - \u5fa1\u5149\u5802\u4e16\u754c~Pulin\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","description":"\u95a2\u6570f=f(x,y)\u304c\u3042\u308b\u3002 \u5168\u5fae\u5206\u306f df=(\u2202f/\u2202x)dx+(\u2202f/\u2202y)dy \u3060\u304b\u3089\u3001df\u306e2\u968e\u306e\u5834\u5408\u306f d^2f=d(df) =(\u2202/\u2202x)((\u2202f/\u2202x)dx+(\u2202f/\u2202y)dy)dx+(\u2202/\u2202y)((\u2202f/\u2202x)dx+(\u2202f/\u2202y)dy)dy =(\u2202^2/\u2202x^2)dx^2+(\u2202^2/\u2202x\u2202y)dydx+(\u2202^2/\u2202y\u2202x)dxdy+(\u2202^2/\u2202y^2)dy^2 =(\u2202^2/\u2202x^2)dx^2+2(\u2202^2/\u2202x\u2202y)dxdy+(\u2202^2/\u2202y^2)dy^2 \u3068\u306a\u308b\u3002 x=x(t) , y=y(t) \u3068\u7f6e\u3051\u308b\u5834\u5408 d^2f/dt^2 =(\u2202^2/\u2202x^2)(dx/dt)^2+2(\u2202^\u2026","height":"190","url":"https://pulin.hateblo.jp/entry/20170402/1491138199","title":"\u5168\u5fae\u5206\u306e2\u968e\u306e\u5834\u5408","image_url":null,"published":"2017-04-02 22:03:19","categories":["\u79c1\u4e8b"],"author_name":"Pulin","width":"100%","blog_url":"https://pulin.hateblo.jp/"}