{"id":901,"date":"2024-03-19T22:06:48","date_gmt":"2024-03-19T14:06:48","guid":{"rendered":"http:\/\/ceshi.cn\/?p=901"},"modified":"2024-03-19T22:06:48","modified_gmt":"2024-03-19T14:06:48","slug":"xitijichu1","status":"publish","type":"post","link":"http:\/\/jhwk.online\/?p=901","title":{"rendered":"\u7126\u70b9\u4e09\u89d2\u5f62\u95ee\u9898"},"content":{"rendered":"\n<div class=\"wp-block-stackable-spacer stk-block-spacer stk--no-padding stk-block stk-ede5a0c\" data-block-id=\"ede5a0c\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u53cc\u66f2\u7ebf\u7684\u7126\u70b9\u4e09\u89d2\u5f62<\/h4>\n\n\n\n<div class=\"wp-block-katex-display-block katex-eq\" data-katex-display=\"true\"><pre>1.\u5df2\u77e5\ud835\udc39_1,\ud835\udc39_2\u662f\u53cc\u66f2\u7ebf\\frac{\ud835\udc65^2}{4}-\\frac{y^2}{2}=1\u7684\u5de6\u53f3\u7126\u70b9,\u8fc7\ud835\udc39_1\u7684\u76f4\u7ebf\u5206\u522b\u4ea4\u53cc\u66f2\u7ebf\u7684\u5de6\u53f3\u4e24~~~~~~~\\\\\u652f\u4e8e\ud835\udc34,\ud835\udc35\u4e24\u70b9\uff0c\u4e14\u2220\ud835\udc39_2\ud835\udc34\ud835\udc35=\u2220\ud835\udc39_2\ud835\udc35\ud835\udc34\uff0c\u6c42|\ud835\udc35\ud835\udc39_2|.\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad<\/pre><\/div>\n\n\n\n<div class=\"wp-block-katex-display-block katex-eq\" data-katex-display=\"true\"><pre>2.\u5df2\u77e5\ud835\udc39_1,\ud835\udc39_2\u662f\u53cc\u66f2\u7ebf\\frac{\ud835\udc65^2}{4}-\\frac{y^2}{3}=1\u7684\u5de6\u53f3\u7126\u70b9,\ud835\udc42\u662f\u5750\u6807\u539f\u70b9\uff0c\ud835\udc43\u662f\u53cc\u66f2\u7ebf\u4e0a\u7684\u4e00\u70b9\uff0c~\\\\\u4e14|\ud835\udc42\ud835\udc43|=\\sqrt{10}\uff0c\u6c42\\cos \u2220 \ud835\udc39_1\ud835\udc43\ud835\udc39_2.\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad\\quad<\/pre><\/div>\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-91e4c34\" data-block-id=\"91e4c34\"><style>.stk-91e4c34 .stk-button-group{flex-direction:row !important;}@media screen and (max-width:999px){.stk-91e4c34 .stk-button-group{flex-direction:row !important;}}@media screen and (max-width:689px){.stk-91e4c34 .stk-button-group{flex-direction:row !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-68ad8bf\" data-block-id=\"68ad8bf\"><style>.stk-68ad8bf .stk-button{background:var(--theme-palette-color-1, #EC6A2B) !important;border-top-left-radius:11px !important;border-top-right-radius:11px !important;border-bottom-right-radius:11px !important;border-bottom-left-radius:11px !important;}.stk-68ad8bf .stk-button:before{box-shadow:0 0 0 2px #7878781a !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" href=\"\/fabu\/%E5%8F%8C%E6%9B%B2%E7%BA%BF%E7%9A%84%E7%84%A6%E7%82%B9%E4%B8%89%E8%A7%92%E5%BD%A2%E7%BB%83%E4%B9%A01%EF%BC%88%E6%8F%90%E9%AB%98%EF%BC%89\/HTML5\/practice.html\" target=\"_blank\" rel=\"noreferrer noopener\"><span class=\"stk-button__inner-text\">\u89c2\u770b\u5fae\u8bfe<\/span><\/a><\/div>\n<\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">\u692d\u5706\u7684\u7126\u70b9\u4e09\u89d2\u5f62<\/h4>\n\n\n\n<div class=\"wp-block-katex-display-block katex-eq\" data-katex-display=\"true\"><pre>3.\u5df2\u77e5F_1,F_2\u662f\u692d\u5706\\frac{x^2}{100}+\\frac{y^2}{64}=1\u7684\u4e24\u4e2a\u7126\u70b9\uff0cP\u662f\u692d\u5706\u4e0a\u4efb\u610f\u4e00\u70b9\uff0c\u82e5\u2220F_1PF_2~~~~~~~~~~\\\\=60^0,\u6c42\u0394F_1PF_2\u7684\u9762\u79ef\u3002~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<\/pre><\/div>\n\n\n\n<div class=\"wp-block-katex-display-block katex-eq\" data-katex-display=\"true\"><pre>4.\u5df2\u77e5\u692d\u5706\\frac{x^2}{4}+\\frac{y^2}{2}=1,P\u662f\u692d\u5706\u4e0a\u7684\u4e00\u70b9\u4e14\u5728\u7b2c\u4e00\u8c61\u9650\uff0cF_1,F_2\u662f\u5de6\u53f3\u7126\u70b9,\u4e14~~~~~~~~~~~\\\\\u2220F_1PF_2=60^0,\u6c42P\u70b9\u5750\u6807\u3002~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<\/pre><\/div>\n\n\n\n<div class=\"wp-block-katex-display-block katex-eq\" data-katex-display=\"true\"><pre>5.\u5df2\u77e5F_1,F_2\u662f\u692d\u5706\\frac{x^2}{a^2}+\\frac{y^2}{b^2}=1(a&gt;b&gt;0)\u7684\u4e24\u4e2a\u7126\u70b9\uff0cP\u662f\u692d\u5706\u4e0a\u4efb\u610f\u4e00\u70b9,\u4e14~~~~~~~~~\\\\\u2220F_1PF_2=60^0.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\\\\(1)\u6c42\u692d\u5706\u79bb\u5fc3\u7387\u7684\u8303\u56f4.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\\\\(2)\u6c42\u8bc1:\u0394F_1PF_2\u7684\u9762\u79ef\u53ea\u4e0e\u692d\u5706\u7684\u77ed\u8f74\u957f\u6709\u5173\u3002~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<\/pre><\/div>\n\n\n\n<div class=\"wp-block-stackable-spacer stk-block-spacer stk--no-padding stk-block stk-702fa3e\" data-block-id=\"702fa3e\"><style>.stk-702fa3e {height:30px !important;}<\/style><\/div>\n\n\n\n<div class=\"wp-block-stackable-button-group stk-block-button-group stk-block stk-587bb37\" data-block-id=\"587bb37\"><style>.stk-587bb37 .stk-button-group{flex-direction:row !important;}@media screen and (max-width:999px){.stk-587bb37 .stk-button-group{flex-direction:row !important;}}@media screen and (max-width:689px){.stk-587bb37 .stk-button-group{flex-direction:row !important;}}<\/style><div class=\"stk-row stk-inner-blocks stk-block-content stk-button-group\">\n<div class=\"wp-block-stackable-button stk-block-button stk-block stk-dd408ef\" data-block-id=\"dd408ef\"><style>.stk-dd408ef .stk-button{background:var(--theme-palette-color-1, #EC6A2B) !important;border-top-left-radius:11px !important;border-top-right-radius:11px !important;border-bottom-right-radius:11px !important;border-bottom-left-radius:11px !important;}.stk-dd408ef .stk-button:before{box-shadow:0 0 0 2px #7878781a !important;}<\/style><a class=\"stk-link stk-button stk--hover-effect-darken\" 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