3:I[9275,[],""] 5:I[1343,[],""] 6:I[4080,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],""] 7:I[231,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],""] 8:I[212,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"default"] 9:I[8629,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],"SearchButton"] a:I[942,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],"AdviserRegistrationButton"] b:I[390,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],"ExamineeRegistrationButton"] c:I[8001,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],"NavigationBarCategoryTabItem"] d:I[2738,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],"ConsultingButton"] e:I[2362,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],"default"] f:I[490,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],"default"] 10:I[3578,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],"default"] 11:I[4404,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","180","static/chunks/180-fa9585ba28b3b839.js","185","static/chunks/app/layout-ec6484a5765a2673.js"],"GoogleAnalytics"] 4:["id","Ry1e02wBTqPwDZPuP97i","d"] 0:["yab-MbJFC1zDbnIJOUFHE",[[["",{"children":["advice",{"children":[["id","Ry1e02wBTqPwDZPuP97i","d"],{"children":["__PAGE__?{\"id\":\"Ry1e02wBTqPwDZPuP97i\"}",{}]}]}]},"$undefined","$undefined",true],["",{"children":["advice",{"children":[["id","Ry1e02wBTqPwDZPuP97i","d"],{"children":["__PAGE__",{},[["$L1","$L2"],null],null]},["$","$L3",null,{"parallelRouterKey":"children","segmentPath":["children","advice","children","$4","children"],"error":"$undefined","errorStyles":"$undefined","errorScripts":"$undefined","template":["$","$L5",null,{}],"templateStyles":"$undefined","templateScripts":"$undefined","notFound":"$undefined","notFoundStyles":"$undefined","styles":null}],null]},["$","$L3",null,{"parallelRouterKey":"children","segmentPath":["children","advice","children"],"error":"$undefined","errorStyles":"$undefined","errorScripts":"$undefined","template":["$","$L5",null,{}],"templateStyles":"$undefined","templateScripts":"$undefined","notFound":"$undefined","notFoundStyles":"$undefined","styles":null}],null]},[["$","html",null,{"lang":"ja","children":[["$","$L6",null,{"async":true,"src":"https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6167616270861177","crossOrigin":"anonymous"}],["$","body",null,{"className":"__className_36bd41","children":[["$","nav",null,{"className":"w-full bg-white text-white py-2","children":[["$","div",null,{"className":"relative h-16 mb-2","children":[["$","div",null,{"className":"absolute w-full flex items-center justify-center","children":["$","$L7",null,{"href":"/","children":["$","$L8",null,{"src":"/images/header.png","alt":"UniLinkヘッダー画像","width":200,"height":63}]}]}],["$","button",null,{"className":"absolute top-0 bottom-0 right-4 text-text","children":["$","$L9",null,{}]}]]}],["$","div",null,{"className":"flex justify-center space-x-2 mb-2","children":[["$","$La",null,{}],["$","$Lb",null,{}]]}],["$","div",null,{"className":"flex justify-center bg-primary","children":["$","div",null,{"className":"flex space-x-1 items-center overflow-x-auto hidden-scrollbar","children":[["$","$Lc","トップ",{"name":"トップ","selected":true}],["$","$Lc","現代文",{"name":"現代文","selected":false}],["$","$Lc","古・漢",{"name":"古・漢","selected":false}],["$","$Lc","数学",{"name":"数学","selected":false}],["$","$Lc","英語",{"name":"英語","selected":false}],["$","$Lc","理科",{"name":"理科","selected":false}],["$","$Lc","日本史",{"name":"日本史","selected":false}],["$","$Lc","世界史",{"name":"世界史","selected":false}],["$","$Lc","やる気",{"name":"やる気","selected":false}],["$","$Lc","時間",{"name":"時間","selected":false}],["$","$Lc","過去問",{"name":"過去問","selected":false}],["$","$Lc","模試",{"name":"模試","selected":false}],["$","$Lc","AO・小論",{"name":"AO・小論","selected":false}],["$","$Lc","ランキング",{"name":"ランキング","selected":false}]]}]}]]}],["$","$L3",null,{"parallelRouterKey":"children","segmentPath":["children"],"error":"$undefined","errorStyles":"$undefined","errorScripts":"$undefined","template":["$","$L5",null,{}],"templateStyles":"$undefined","templateScripts":"$undefined","notFound":["$","div",null,{"className":"px-4 py-4 text-center","children":[["$","h1",null,{"className":"text-4xl mb-4","children":"404"}],"指定されたページが見つかりませんでした。ページが削除または移動された可能性があります。"]}],"notFoundStyles":[],"styles":null}],["$","div",null,{"className":"fixed bottom-4 md:bottom-8 right-4 md:right-8 z-10","children":["$","$Ld",null,{}]}],["$","footer",null,{"className":"bg-gray-100","children":[["$","div",null,{"className":"px-4","children":["$","div",null,{"className":"max-w-5xl mx-auto w-full","children":[["$","$Le",null,{"sx":{"backgroundColor":"inherit","zIndex":1},"elevation":0,"children":[["$","$Lf",null,{"sx":{"paddingLeft":0,"paddingRight":0},"className":"font-semibold","expandIcon":["$","svg",null,{"stroke":"currentColor","fill":"currentColor","strokeWidth":"0","viewBox":"0 0 24 24","children":["$undefined",[["$","path","0",{"fill":"none","d":"M0 0h24v24H0V0z","children":[]}],["$","path","1",{"d":"M7.41 8.59 12 13.17l4.59-4.58L18 10l-6 6-6-6 1.41-1.41z","children":[]}]]],"className":"$undefined","style":{"color":"$undefined"},"height":"1em","width":"1em","xmlns":"http://www.w3.org/2000/svg"}],"children":"UniLink（ユニリンク）とは"}],["$","$L10",null,{"sx":{"paddingLeft":0,"paddingRight":0},"children":["$","div",null,{"className":"text-sm font-normal leading-relaxed","children":["UniLink（ユニリンク）とは、受験生会員数13万人以上、相談投稿数10万件以上を有する国内最大級のハイレベル受験質問プラットフォームです。",["$","br",null,{}],["$","br",null,{}],"全ての受験生が、受験の悩みや不安を無料で現役難関大生に質問できます。また、過去に投稿された全ての質問と回答を閲覧することもできます。",["$","br",null,{}],["$","br",null,{}],"質問に回答するすべての回答者は、学生証などを使用してUniLinkによって審査された東大・京大・慶應・早稲田・一橋・東工大・旧帝大のいずれかに所属する現役難関大生です。回答者の審査では、さらに実際の回答をUniLinkが確認して、一定の水準をクリアした合格者だけが登録できる仕組みとなっています。",["$","br",null,{}],["$","br",null,{}],"UniLink利用者の80%以上は、難関大学を志望する受験生です。ライバルから刺激を得て、合格者の知恵を1つでも多く吸収し、ハイレベルな受験対策を行いましょう。"]}]}]]}],["$","div",null,{"className":"border-b"}],["$","div",null,{"className":"py-4","children":[["$","div",null,{"className":"font-semibold","children":"UniLink公式SNSアカウント"}],["$","div",null,{"className":"text-sm font-normal leading-relaxed mb-2","children":"最新回答を短く要約してお届けします。"}],["$","div",null,{"children":["$","div",null,{"children":[["$","a",null,{"href":"https://twitter.com/unilink_study?ref_src=twsrc%5Etfw","className":"twitter-follow-button","data-show-count":"false","children":"@unilink_studyをフォロー"}],["$","$L6",null,{"async":true,"src":"https://platform.twitter.com/widgets.js"}]]}]}]]}],["$","div",null,{"className":"border-b"}],["$","div",null,{"className":"py-4","children":[["$","div",null,{"className":"font-semibold","children":"UniLink公式スマホアプリ"}],["$","div",null,{"children":["$","$L7",null,{"href":"https://unilink-app.onelink.me/isbO/iomezpbt","target":"_blank","children":["$","$L8",null,{"src":"/images/web_to_app_banner.jpg","width":3660,"height":1500,"sizes":"100vw","style":{"width":"100%","height":"auto"},"alt":"UniLink WebToAppバナー画像","className":"max-w-sm rounded"}]}]}]]}],["$","div",null,{"className":"border-b"}],["$","div",null,{"className":"flex flex-wrap items-center gap-4 py-4","children":[["$","$L7",null,{"className":"footer-button","href":"https://about.uni-link.co.jp/","children":"会社概要"}],["$","div",null,{"className":"footer-divider","children":"|"}],["$","$L7",null,{"className":"footer-button","href":"https://about.uni-link.co.jp/contact/","children":"お問い合わせ"}],["$","div",null,{"className":"footer-divider","children":"|"}],["$","$L7",null,{"className":"footer-button","href":"https://about.uni-link.co.jp/","children":"広告出稿"}],["$","div",null,{"className":"footer-divider","children":"|"}],["$","$L7",null,{"className":"footer-button","href":"https://about.uni-link.co.jp/documentdl/","children":"媒体資料ダウンロード"}],["$","div",null,{"className":"footer-divider","children":"|"}],["$","$L7",null,{"className":"footer-button","href":"https://about.uni-link.co.jp/terms/","children":"利用規約"}],["$","div",null,{"className":"footer-divider","children":"|"}],["$","$L7",null,{"className":"footer-button","href":"https://about.uni-link.co.jp/privacypolicy/","children":"プライバシーポリシー"}],["$","div",null,{"className":"footer-divider","children":"|"}],["$","$L7",null,{"className":"footer-button","href":"https://about.uni-link.co.jp/tokutei-law/","children":"特定商取引に関する表記"}],["$","div",null,{"className":"footer-divider","children":"|"}],["$","$L7",null,{"className":"footer-button","href":"/sitemap.xml","children":"サイトマップ"}]]}]]}]}],["$","div",null,{"className":"bg-primary px-4 pt-4 pb-20","children":["$","div",null,{"className":"max-w-5xl mx-auto w-full flex justify-between items-center","children":[["$","div",null,{"className":"rounded overflow-hidden","children":["$","$L7",null,{"href":"/","children":["$","$L8",null,{"src":"/images/header.png","alt":"UniLinkヘッダー画像","width":100,"height":32}]}]}],["$","div",null,{"className":"text-white text-sm","children":"©UniLink, Inc."}]]}]}]]}]]}],["$","$L11",null,{"gaId":"G-ELSR1M4E8Q"}]]}],null],null],[[["$","link","0",{"rel":"stylesheet","href":"/_next/static/css/85d7fb81f313170a.css","precedence":"next","crossOrigin":"$undefined"}]],[null,"$L12"]]]]] 12:[["$","meta","0",{"name":"viewport","content":"width=device-width, initial-scale=1"}],["$","meta","1",{"charSet":"utf-8"}],["$","title","2",{"children":"数列の問題に出てきた式の変形 | UniLink"}],["$","meta","3",{"name":"description","content":"Σ［1→n-1］C［2k，2］= Σ［1→n-1］2k(2k-1)/2この変形がわかりません。何か公式を使うのだったら教えていただければ嬉しいです。"}],["$","link","4",{"rel":"icon","href":"/favicon.ico","type":"image/x-icon","sizes":"48x48"}],["$","link","5",{"rel":"icon","href":"/icon.png?2c0dc65a59843333","type":"image/png","sizes":"180x180"}],["$","link","6",{"rel":"apple-touch-icon","href":"/apple-icon.png?2c0dc65a59843333","type":"image/png","sizes":"180x180"}],["$","meta","7",{"name":"next-size-adjust"}]] 1:null 13:I[3903,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"ClientInfo"] 14:I[2798,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"AdUnderConsultation"] 15:I[2582,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"AdviserInfo"] 16:I[9083,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"AdviserProfile"] 17:I[7060,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"AdUnderAdvice"] 18:I[3194,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"CommentPostButton"] 19:I[6411,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"CommentItemAvatar"] 1a:I[6549,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"CommentItemName"] 1c:I[3866,["51","static/chunks/795d4814-03346c8d233b4adb.js","212","static/chunks/212-70508e17017a12c2.js","231","static/chunks/231-5dc9f3acdba63b0c.js","54","static/chunks/54-f848f8ba1c362ca7.js","23","static/chunks/app/advice/%5Bid%5D/page-186819a87df201a3.js"],"AdOnAdviceList1"] 1b:Tf02,センター試験の集合は、実数の集合を扱うことが多いため、数直線上に図示するのが有効なことが多いです。 目盛の間隔を正確に図示する必要はなく、それぞれの端の大小と、黒丸白丸があっているかが重要です。(黒丸の場合はその点を含む、白丸の時はその点を含まないことを表します。不等号に=が入っているかどうかの違いとも言えます。) 例えば、 p: x>1 q:x≦2 のように与えられていた時、右向きの数直線上に左から1と2の点を書きます。 pについては、x>1(つまり「xは1より大きい」)であることから、先ほど書いた1の点に白丸を書き、そこから右上がりに少し直線を書き、そこから右向きに直線を伸ばします。新幹線のような形になります。この形は、1の点を含まないことを表すもので、白丸と同じ意味ですが、ぱっと見で分かるように両方使います。また、この線がpであることをどこかに書いておいてください。 qについては、x≦2(つまり｢xは2以下｣)であるので、2の点に黒丸を書き、そこから真下に少し直線を書き、左向きの直線を伸ばします。こちらは、電車のような形になります。この形は、2を含むことを表すもので、黒丸と同じ意味です。こちらの線にも、qであることを書いておいてください。 このように、範囲を一つ一つ図示していくと、次のようになります。 _______________ p / 2 ---------○-----●------->x 1 | q --------------- これを見れば、「pかつq」や、「pまたはq」「p⇒q は真か偽か」はすぐに分かるはずです。たとえば｢pかつq｣なら、pとqが重なっているところなので、1