{"id":4463,"date":"2013-12-23T06:00:59","date_gmt":"2013-12-22T21:00:59","guid":{"rendered":"http:\/\/fujiitoshiki.com\/improvesociety\/?p=4463"},"modified":"2014-09-10T16:48:07","modified_gmt":"2014-09-10T07:48:07","slug":"post-4463","status":"publish","type":"post","link":"https:\/\/www.fujiitoshiki.com\/improvesociety\/?p=4463","title":{"rendered":"\u6975\u5927\u3068\u6975\u5c0f"},"content":{"rendered":"<div class=\"theContentWrap-ccc\"><p>\u3000\u5168\u3066\u306e x \u306b\u3064\u3044\u3066 |<span style=\"font-style: italic\">x &#8211; a<\/span>| < <span style=\"font-style: italic\">&delta;<\/span> \u3067\u3042\u308a\uff0c\u307e\u305f <span style=\"font-style: italic\">f(x)<\/span> &le; <span style=\"font-style: italic\">f(a)<\/span> \uff08\u307e\u305f\u306f <span style=\"font-style: italic\">f(x)<\/span> &ge; <span style=\"font-style: italic\">f(a)<\/span>\uff09\u3067\u3042\u308b\u6642\uff0c<span style=\"font-style: italic\">f(a)<\/span> \u306f\u6975\u5927\uff08\u307e\u305f\u306f\u6975\u5c0f\uff09\u3067\u3042\u308b\u3068\u8a00\u3044\u307e\u3059\uff0e<\/p>\n<p>\u3000<span style=\"font-style: italic\">f(x)<\/span> \u304c <span style=\"font-style: italic\">x = a<\/span> \u306b\u304a\u3044\u3066\u6975\u5927\u307e\u305f\u306f\u6975\u5c0f\u3092\u6301\u3064\u306b\u306f <span style=\"font-style: italic\">f'(a)<\/span> = 0 \u3067\u306a\u304f\u3066\u306f\u306a\u308a\u307e\u305b\u3093\uff0e\u3082\u3057 <span style=\"font-style: italic\">f&#8221;(a)<\/span> < 0 \u306a\u3089\u305d\u308c\u306f\u6975\u5927\u3067\u3042\u308a\uff0c\u4e00\u65b9\u3082\u3057 <span style=\"font-style: italic\">f&#8221;(a)<\/span> > 0 \u306a\u3089\u305d\u308c\u306f\u6975\u5c0f\u3067\u3059\uff0e<span style=\"font-style: italic\">f(x)<\/span> \u306b\u304a\u3044\u3066\u6975\u5927\u307e\u305f\u306f\u6975\u5c0f\u3068\u306a\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u70b9\u306f <span style=\"font-style: italic\">f'(x)<\/span> = 0 \u3092\u89e3\u304f\u3053\u3068\uff0c\u4f8b\u3048\u3070\uff0c <span style=\"font-style: italic\">f(x)<\/span> \u306e\u30b0\u30e9\u30d5\u306e <span style=\"font-style: italic\">\u50be\u304d<\/span> \u304c\u30bc\u30ed\u3068\u7b49\u3057\u304f\u306a\u308b <span style=\"font-style: italic\">x<\/span> \u306e\u5024\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u3067\u5f97\u3089\u308c\u307e\u3059\uff0e<\/p>\n<p>\u3000\u540c\u69d8\u306b <span style=\"font-style: italic\">f<sub>x<\/sub>(a, b)<\/span> = 0, <span style=\"font-style: italic\">f<sub>y<\/sub>(a, b)<\/span> = 0 \u306a\u3089\u3070 <span style=\"font-style: italic\">f(x, y)<\/span> \u306f <span style=\"font-style: italic\">x = a, y = b<\/span> \u306b\u304a\u3044\u3066\u6975\u5927\u307e\u305f\u306f\u6975\u5c0f\u3092\u6301\u3061\u307e\u3059\uff0e\u6545\u306b <span style=\"font-style: italic\">f(x, y)<\/span>  <span style=\"font-style: italic\">f(x, y)<\/span> \u3067\u6975\u5927\u307e\u305f\u306f\u6975\u5c0f\u3092\u3082\u3064\u53ef\u80fd\u6027\u306e\u3042\u308b\u70b9\u306f\uff0c\u540c\u69d8\u306b\u6b21\u306e\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u3053\u3068\u3067\u5f97\u3089\u308c\u307e\u3059\uff0e<\/p>\n<p><img src='https:\/\/s0.wp.com\/latex.php?latex=%5Cdisplaystyle+%5Cfrac%7B%5Cpartial+f%7D%7B%5Cpartial+x%7D+%3D+0%2C%5C+%5Cfrac%7B%5Cpartial+f%7D%7B%5Cpartial+y%7D+%3D+0&#038;bg=T&#038;fg=000000&#038;s=0' alt='\\displaystyle \\frac{\\partial f}{\\partial x} = 0,\\ \\frac{\\partial f}{\\partial y} = 0' title='\\displaystyle \\frac{\\partial f}{\\partial x} = 0,\\ \\frac{\\partial f}{\\partial y} = 0' class='latex' \/><\/p>\n<p>\u30002 \u5909\u6570\u4ee5\u4e0a\u306e\u95a2\u6570\u3078\u306e\u62e1\u5f35\u3082\u540c\u69d8\u3067\u3059\uff0e<\/p>\n<p><iframe src=\"\/\/rcm-fe.amazon-adsystem.com\/e\/cm?lt1=_blank&#038;bc1=000000&#038;IS2=1&#038;bg1=FFFFFF&#038;fc1=000000&#038;lc1=0000FF&#038;t=fujiitoshiki-22&#038;o=9&#038;p=8&#038;l=as4&#038;m=amazon&#038;f=ifr&#038;ref=ss_til&#038;asins=0071635408\" style=\"width:120px;height:240px;\" scrolling=\"no\" marginwidth=\"0\" marginheight=\"0\" frameborder=\"0\"><\/iframe><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>\u3000\u5168\u3066\u306e x \u306b\u3064\u3044\u3066 |x &#8211; a| < &delta; \u3067\u3042\u308a\uff0c\u307e\u305f f(x) &le; f(a) \uff08\u307e\u305f\u306f f(x) &ge; f(a)\uff09\u3067\u3042\u308b\u6642\uff0cf(a) \u306f\u6975\u5927\uff08\u307e\u305f\u306f\u6975\u5c0f\uff09\u3067\u3042\u308b\u3068\u8a00\u3044\u307e\u3059\uff0e \u3000f &hellip; <a href=\"https:\/\/www.fujiitoshiki.com\/improvesociety\/?p=4463\" class=\"more-link\"><span class=\"screen-reader-text\">&#8220;\u6975\u5927\u3068\u6975\u5c0f&#8221; \u306e<\/span>\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":6040,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-4463","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mathematics"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=\/wp\/v2\/posts\/4463","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4463"}],"version-history":[{"count":11,"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=\/wp\/v2\/posts\/4463\/revisions"}],"predecessor-version":[{"id":6800,"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=\/wp\/v2\/posts\/4463\/revisions\/6800"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=\/wp\/v2\/media\/6040"}],"wp:attachment":[{"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fujiitoshiki.com\/improvesociety\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}