[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/all2jp\/wiki10\/archives\/523#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/all2jp\/wiki10\/archives\/523","headline":"\u7acb\u65b9\u6a5f\u80fd – \u30a6\u30a3\u30ad\u30da\u30c7\u30a3\u30a2","name":"\u7acb\u65b9\u6a5f\u80fd – \u30a6\u30a3\u30ad\u30da\u30c7\u30a3\u30a2","description":"before-content-x4 \u7acb\u65b9\u4f53\u95a2\u6570\u306e\u30b0\u30e9\u30d5;\u30bc\u30ed\u30dd\u30a4\u30f3\u30c8\uff08y = 0\uff09\u306f\u30b0\u30e9\u30d5\u304c\u3042\u308b\u3068\u3053\u308d\u3067\u3059 \u30d0\u30c4 – \u30a4\u30fc\u30f3\u30ab\u30c3\u30c8\u3002\u30b0\u30e9\u30d5\u306b\u306f2\u3064\u306e\u6975\u7aef\u306a\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002 \u7acb\u65b9\u95a2\u6570\u306e\u30b0\u30e9\u30d5f\uff08x\uff09= 1-x+x\u00b2+x\u00b3 \u6570\u5b66\u3067\u306f1\u3064\u3092\u610f\u5473\u3057\u307e\u3059 \u7acb\u65b9\u6a5f\u80fd 3\u5ea6\u76ee\u306e\u5b8c\u5168\u306a\u5408\u7406\u7684\u95a2\u6570\u3001\u3059\u306a\u308f\u3061\u95a2\u6570 f \uff1a r \u2192 r {displaystyle fcolon mathbb","datePublished":"2020-04-01","dateModified":"2020-04-01","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/all2jp\/wiki10\/archives\/author\/lordneo#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/all2jp\/wiki10\/archives\/author\/lordneo","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/44a4cee54c4c053e967fe3e7d054edd4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/44a4cee54c4c053e967fe3e7d054edd4?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/a\/af\/Polynomialdeg_3.svg\/220px-Polynomialdeg_3.svg.png","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/a\/af\/Polynomialdeg_3.svg\/220px-Polynomialdeg_3.svg.png","height":"169","width":"220"},"url":"https:\/\/wiki.edu.vn\/all2jp\/wiki10\/archives\/523","wordCount":10774,"articleBody":" (adsbygoogle = window.adsbygoogle || []).push({});before-content-x4 \u7acb\u65b9\u4f53\u95a2\u6570\u306e\u30b0\u30e9\u30d5;\u30bc\u30ed\u30dd\u30a4\u30f3\u30c8\uff08y = 0\uff09\u306f\u30b0\u30e9\u30d5\u304c\u3042\u308b\u3068\u3053\u308d\u3067\u3059 \u30d0\u30c4 – \u30a4\u30fc\u30f3\u30ab\u30c3\u30c8\u3002\u30b0\u30e9\u30d5\u306b\u306f2\u3064\u306e\u6975\u7aef\u306a\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002 \u7acb\u65b9\u95a2\u6570\u306e\u30b0\u30e9\u30d5f\uff08x\uff09= 1-x+x\u00b2+x\u00b3 \u6570\u5b66\u3067\u306f1\u3064\u3092\u610f\u5473\u3057\u307e\u3059 \u7acb\u65b9\u6a5f\u80fd 3\u5ea6\u76ee\u306e\u5b8c\u5168\u306a\u5408\u7406\u7684\u95a2\u6570\u3001\u3059\u306a\u308f\u3061\u95a2\u6570 f \uff1a r \u2192 r {displaystyle fcolon mathbb {r} to mathbb {r}} (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4\u5f62\u306b\u3042\u308b\u5b9f\u6570\u306b\u3064\u3044\u3066 (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4f \uff08 \u30d0\u30c4 \uff09\uff09 = a \u30d0\u30c4 3+ b \u30d0\u30c4 2+ c \u30d0\u30c4 + d {displaystyle f\uff08x\uff09= ax^{3}+bx^{2}+cx+d} \u3068 a \u3001 b \u3001 c \u3001 d \u2208 r {displaystyle a\u3001b\u3001c\u3001din mathbb {r}} \u3068 a \u2260 0 {displaystyle aneq 0} \u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4\u7acb\u65b9\u6a5f\u80fd\u306f\u3001\u30dd\u30ea\u30ce\u30e0\u306e\u5b9f\u969b\u306e\u591a\u9805\u5f0f\u6a5f\u80fd\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059 r {displaystyle mathbb {r}} \u7406\u89e3\u3055\u308c\u307e\u3059\u3002 Table of Contents\u7121\u9650\u306e\u884c\u52d5 [ \u7de8\u96c6 | \u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3092\u7de8\u96c6\u3057\u307e\u3059 ] \u30bc\u30ed\u30dd\u30a4\u30f3\u30c8 [ \u7de8\u96c6 | \u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3092\u7de8\u96c6\u3057\u307e\u3059 ] \u5358\u8abf\u3068\u5730\u5143\u306e\u30a8\u30af\u30b9\u30c8\u30e9 [ \u7de8\u96c6 | \u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3092\u7de8\u96c6\u3057\u307e\u3059 ] \u30bf\u30fc\u30cb\u30f3\u30b0\u30dd\u30a4\u30f3\u30c8\u3068\u5bfe\u79f0\u6027 [ \u7de8\u96c6 | \u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3092\u7de8\u96c6\u3057\u307e\u3059 ] \u901a\u5e38\u306e\u30d5\u30a9\u30fc\u30e0 [ \u7de8\u96c6 | \u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3092\u7de8\u96c6\u3057\u307e\u3059 ] \u7121\u9650\u306e\u884c\u52d5 [ \u7de8\u96c6 | \u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3092\u7de8\u96c6\u3057\u307e\u3059 ] unchallow\u7a0b\u5ea6\u306e\u3059\u3079\u3066\u306e\u5408\u7406\u7684\u306a\u6a5f\u80fd\u3068\u540c\u69d8 \u30ea\u30e0 x\u2192+\u221ef \uff08 \u30d0\u30c4 \uff09\uff09 = + \u221e {displaystyle lim limits _ {xto +infty} f\uff08x\uff09= +infty} \u3001 \u30ea\u30e0 x\u2192\u2212\u221ef \uff08 \u30d0\u30c4 \uff09\uff09 = – \u221e {displaystyle lim limits _ {xto -infty} f\uff08x\uff09= -infty} \u3001 \u4e3b\u8981\u306a\u4fc2\u6570\u306e\u5834\u5408 a {displaystyle a} \u30dd\u30b8\u30c6\u30a3\u30d6\u3067\u3059 \u30ea\u30e0 x\u2192+\u221ef \uff08 \u30d0\u30c4 \uff09\uff09 = – \u221e {displaystyle lim limits _ {xto +infty} f\uff08x\uff09= – infty} \u3001 \u30ea\u30e0 x\u2192\u2212\u221ef \uff08 \u30d0\u30c4 \uff09\uff09 = + \u221e {displaystyle lim limits _ {xto -infty} f\uff08x\uff09=+infty} \u3001 \u6edd a {displaystyle a} \u30cd\u30ac\u30c6\u30a3\u30d6\u3067\u3059\u3002 \u30bc\u30ed\u30dd\u30a4\u30f3\u30c8 [ \u7de8\u96c6 | \u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3092\u7de8\u96c6\u3057\u307e\u3059 ] \u7acb\u65b9\u4f53\u95a2\u6570\u306f\u591a\u9805\u5f0f\u95a2\u6570\u3068\u3057\u3066\u5b89\u5b9a\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u7121\u9650\u3068\u4e2d\u9593\u5024\u306e\u6319\u52d5\u306f\u3001\u5e38\u306b\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u5b9f\u969b\u306e\u30bc\u30ed\u3092\u6301\u3064\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u4e00\u65b9\u3001\u7a0b\u5ea6\u306e\u5408\u7406\u7684\u306a\u6a5f\u80fd\u5168\u4f53\u304c\u3067\u304d\u307e\u3059 n {displaystyle n} \u4ee5\u4e0b n {displaystyle n} \u72ec\u81ea\u306e\u30bc\u30ed\u30dd\u30a4\u30f3\u30c8\u3002\u305d\u306e\u305f\u3081\u3001\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002\u7acb\u65b9\u4f53\u95a2\u6570\u304c\u3042\u308a\u307e\u3059 r {displaystyle mathbb {r}} \u5c11\u306a\u304f\u3068\u30821\u3064\u3068\u6700\u59273\u3064\u306e\u30bc\u30ed\u30dd\u30a4\u30f3\u30c8\u3002 \u7acb\u65b9\u6a5f\u80fd\u306e\u30bc\u30ed\u70b9\u306e\u767a\u898b\u306b\u3064\u3044\u3066\u306f\u3001Cardian\u65b9\u7a0b\u5f0f\u3068\u30ab\u30eb\u30c0\u30cb\u30a2\u30f3\u5f0f\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u4e00\u822c\u7684\u306a\u7acb\u65b9\u6a5f\u80fd\u306e\u5224\u5225 f {displaystyle f} \u30b1\u30fc\u30b9\u3067\u3059 d = b 2c 2 – 4 a c 3 – 4 b 3d – 27 a 2d 2+ 18 a b c d {displaystyle d = b^{2} c^{2} -4ac^{3} -4b^{3} d-27a^{2} d^{2}+18abcd} \u591a\u9805\u5f0f\u306e\u30bc\u30ed\u30dd\u30a4\u30f3\u30c8\u5206\u985e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\uff1a\u5834\u5408 0″>\u30b1\u30fc\u30b9\u306b\u306f3\u3064\u306e\u7570\u306a\u308b\u5b9f\u969b\u306e\u30bc\u30ed\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059 d < 0 {displaystyle d 13ab3\u221292abc+272a2d+(b3\u221292abc+272a2d)2\u2212(b2\u22123ac)33 – {displaystyle nst = – {frac {b} {3a}} – {frac {1} {3a}} {sqrt [{3}] {b^{3} – {frac {9} {2}} {27} {2} {2} {2} {2} {2} {2} {2} {2} {2} {2} {2} {2} {2} {2} {2} {2} {2} l\uff08} b^{3} – {frac {9} {2}} abc+{frac {27} {2}} a^{2} d {bigr\uff09}^{2} – {bigl\uff08} b^{2} -3ac\uff09}^{3}}}}}}}} – 13ab3\u221292abc+272a2d\u2212(b3\u221292abc+272a2d)2\u2212(b2\u22123ac)33{displaystyle-{frac {1} {3a}} {sqrt [{3}] {b^{3} – {frac {9} {2}} abc+{frac {27} {2}} a^{2} d- {{} {} {} {} {} {} {} {} {2}} abc+{frac {27} {2}} a^{2} d {bigr\uff09}^{2} – {vigl\uff08} b^{2} -3ac {bigr\uff09}^{3}}}}}}}}}}}}}}}}} \u5e73\u65b9\u6839\u4e0b\u306e\u5f0f\u306f\u6b63\u3067\u3059\u3002 \u3053\u306e\u30bc\u30ed\u30dd\u30a4\u30f3\u30c8\u30d5\u30a9\u30fc\u30df\u30e5\u30e9\u306f\u3001\u6b63\u65b9\u5f62\u306e\u771f\u591c\u4e2d\u306e\u30d5\u30a9\u30fc\u30df\u30e5\u30e9\u306e\u7acb\u65b9\u985e\u306e\u30a2\u30ca\u30ed\u30b0\u3092\u5f62\u6210\u3057\u307e\u3059\u3002 \u305f\u3068\u3048\u3070\u3001\u30cb\u30e5\u30fc\u30c8\u30f3\u30d7\u30ed\u30bb\u30b9\u3067\u306f\u30bc\u30ed\u30dd\u30a4\u30f3\u30c8\u306e\u6570\u5024\u767a\u898b\u304c\u53ef\u80fd\u3067\u3059\u3002 \u8868\u73fe b3a{displaystyle {tfrac {b} {3a}}} \u30da\u30fc\u30b8\u306e\u7b97\u8853\u5e73\u5747\u3092\u8868\u3057\u307e\u3059 a {displaystyle a} \u3001 b {displaystyle b} \u3068 c {displaystyle c} \u305d\u308c\u306b\u5339\u6575\u3059\u308b\u7acb\u65b9\u4f53 p2{displaystyle {tfrac {p} {2}}} \u30da\u30fc\u30b8\u306e\u7b97\u8853\u5e73\u5747\u304c a {displaystyle a} \u3068 b {displaystyle b} \u9577\u65b9\u5f62\u3067\u3059\u3002 \u7acb\u65b9\u4f53\u95a2\u6570\u306f\u3001\u30bc\u30ed\u30dd\u30a4\u30f3\u30c8\u5f62\u5f0f\u3068\u3057\u3066\u8868\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 f \uff08 \u30d0\u30c4 \uff09\uff09 = \uff08 \u30d0\u30c4 + a \uff09\uff09 \uff08 \u30d0\u30c4 + b \uff09\uff09 \uff08 \u30d0\u30c4 + c \uff09\uff09 {displaystyle f\uff08x\uff09=\uff08x+a\uff09\uff08x+b\uff09\uff08x+c\uff09} \u3042\u308b a {displaystyle a} \u3001 b {displaystyle b} \u3068 c {displaystyle c} \u7acb\u65b9\u4f53\u306e\u5074\u9762\u3002\u306e\u524d\u306e\u8981\u56e0 \u30d0\u30c4 3 {displaystyle x^{3}} \u95a2\u6570\u306e\u52fe\u914d\u306f\u3001\u7acb\u65b9\u4f53\u306e\u6570\u307e\u305f\u306f\u7acb\u65b9\u4f53\u306e\u5272\u5408\u3001\u524d\u306e\u56e0\u5b50\u306b\u5bfe\u5fdc\u3057\u307e\u3059 \u30d0\u30c4 2 {displaystyle x^{2}} \u526f\u91cf\u306b\u5bfe\u5fdc\u3057\u3001\u524d\u306e\u56e0\u5b50 \u30d0\u30c4 {displaystyle x} \u7acb\u65b9\u4f53\u306e\u8868\u9762\u306e\u534a\u5206\u3068\u7acb\u65b9\u4f53\u306e\u30dc\u30ea\u30e5\u30fc\u30e0\u306e\u5b9a\u6570\u306b\u5bfe\u5fdc\u3057\u307e\u3059\u3002 f \uff08 \u30d0\u30c4 \uff09\uff09 = m \u30d0\u30c4 3+ \uff08 a + b + c \uff09\uff09 \u30d0\u30c4 2+ \uff08 a b + a c + b c \uff09\uff09 \u30d0\u30c4 + a b c {displaystyle f\uff08x\uff09= mx^{3}+\uff08a+b+c\uff09x^{2}+\uff08ab+ac+bc\uff09x+abc} \u6b63\u65b9\u5f62\u95a2\u6570\u306e\u9802\u70b9\u5f62\u5f0f\u306b\u985e\u4f3c\u3057\u3066\u3001\u30bf\u30fc\u30cb\u30f3\u30b0\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u7acb\u65b9\u4f53\u306e\u8ffd\u52a0\u306e\u52a9\u3051\u3092\u501f\u308a\u3066\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3067\u304d\u307e\u3059\u3002 f \uff08 \u30d0\u30c4 \uff09\uff09 = (x+a+b+c3)3+ d \u30d0\u30c4 + \u305d\u3046\u3067\u3059 {displaystyle f\uff08x\uff09= left\uff08x+{tfrac {a+b+c} {3}}\u53f3\uff09^{3}+dx+e} \u4f8b f(x)=x3+9x2+20x+12=(x+3)3\u22127x\u2212157x+15=(x+3)3{displaystyle {begin {aligned} f\uff08x\uff09\uff06= x^{3}+9x^{2}+20x+12 \\\uff06=\uff08x+3\uff09^{3} -7x-15 \\ 7x+15\uff06=\uff08x+3\uff09^{3} end {aligned}}}}}} \u6700\u521d\u306e\u30bc\u30ed\u306f\u540c\u3058\u3067\u3059 \u30d0\u30c4 = – 3 + 2 = – \u521d\u3081 {displaystyle x = -3+2 = -1} \u3001\u30bf\u30fc\u30cb\u30f3\u30b0\u30dd\u30a4\u30f3\u30c8\u306f\u3067\u3059 \u22123f(\u22123){displaystyle {tfrac {-3} {f\uff08-3\uff09}}}} \u3001 b + c = 8 = p {displaystyle b+c = 8 = p} \u3001 b c = 12\u756a\u76ee = Q {displaystyle bc = 12 = q} \u3002 2\u756a\u76ee\u30683\u756a\u76ee\u306e\u30bc\u30ed\u306e\u4f4d\u7f6e\u306f\u3001\u6b63\u65b9\u5f62\u306e\u30b5\u30d7\u30ea\u30e1\u30f3\u30c8\u306b\u306a\u308a\u307e\u3059\u3002 \u30d0\u30c4 = – 3 + \u521d\u3081 = – 2 {displaystyle x = -3+1 = -2} \u3068 \u30d0\u30c4 = – 3 – 3 = – 6 {displaystyle x = -3-3 = -6} \u3002 \u5358\u8abf\u3068\u5730\u5143\u306e\u30a8\u30af\u30b9\u30c8\u30e9 [ \u7de8\u96c6 | \u30bd\u30fc\u30b9\u30c6\u30ad\u30b9\u30c8\u3092\u7de8\u96c6\u3057\u307e\u3059 ] \u591a\u9805\u5f0f\u6a5f\u80fd\u3068\u3057\u3066 f {displaystyle f} \u3053\u308c\u4ee5\u4e0a\u983b\u7e41\u306b\u7570\u306a\u308a\u307e\u3059\u3002\u3042\u306a\u305f\u306e\u6700\u521d\u306e\u6d3e\u751f\u306e\u305f\u3081\u306b f ‘ {displaystyle f ‘} \u6b63\u65b9\u5f62\u306e\u95a2\u6570\u306e\u7d50\u679c f ‘ \uff08 \u30d0\u30c4 \uff09\uff09 = 3 a \u30d0\u30c4 2+ 2 b \u30d0\u30c4 + c {displaystyle f ‘\uff08x\uff09= 3ax^{2}+2bx+c} \u3002 \u5f7c\u3089\u306e\u5224\u5225\u3067\u3059 4 b 2 – 12\u756a\u76ee a c {displaystyle 4b^{2} -12ac} \u30dd\u30b8\u30c6\u30a3\u30d6\u3001d\u3002 H.\u9069\u7528\u3055\u308c\u307e\u3059 3ac”>\u3001\u3060\u304b\u3089\u6240\u6709\u3057\u3066\u3044\u307e\u3059 f {displaystyle f} \u6b63\u78ba\u306b\u30ed\u30fc\u30ab\u30eb\u306e\u6700\u5927\u5024\u3068\u6b63\u78ba\u306a\u30ed\u30fc\u30ab\u30eb\u6700\u5c0f\u3002\u305d\u3046\u3067\u306a\u3051\u308c\u3070 f {displaystyle f} \u53b3\u5bc6\u306b\u5358\u8abf\u3067\u3001\u53b3\u5bc6\u306b\u5358\u8abf\u3067\u3059 0″>\u305d\u3057\u3066\u3001\u53b3\u5bc6\u306b\u5358\u8abf\u3067\u3059 a < 0 {displaystyle a { – \u521d\u3081 \u3001 0 \u3001 \u521d\u3081 } {displaystyle kin {-1,0,1}} \u6301\u3063\u3066\u3044\u304f\u3002 \u3057\u305f\u304c\u3063\u3066\u3001\u3053\u306e\u901a\u5e38\u306e\u30d5\u30a9\u30fc\u30e0\u306e3\u3064\u306e\u53ef\u80fd\u306a\u30b1\u30fc\u30b9\u3092\u6b63\u78ba\u306b\u53d6\u5f97\u3057\u307e\u3059\u3002\uff1a k = – \u521d\u3081 {displaystyle k = -1} \uff1a\u306e\u30b0\u30e9\u30d5 g {displaystyle g} 2\u3064\u306e\u6975\u7aef\u306a\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002 k = 0 {displaystyle k = 0} \uff1a\u6975\u7aef\u306a\u30dd\u30a4\u30f3\u30c8\u306f\u3001\u6b63\u78ba\u306b1\u3064\u306e\u30b5\u30c9\u30eb\u30dd\u30a4\u30f3\u30c8\u306b\u5d29\u58ca\u3057\u307e\u3059\u3002 k = \u521d\u3081 {displaystyle k = 1} \uff1a\u306e\u30b0\u30e9\u30d5 g {displaystyle g} \u6d3e\u751f\u304c\u5b9a\u7fa9\u7bc4\u56f2\u5168\u4f53\u3067\u30d7\u30e9\u30b9\u306b\u306a\u308b\u305f\u3081\u3001\u8ffd\u52a0\u306e\u30dd\u30a4\u30f3\u30c8\u3082\u30b5\u30c9\u30eb\u30dd\u30a4\u30f3\u30c8\u3082\u3042\u308a\u307e\u305b\u3093\u3002 \u901a\u5e38\u306e\u5f62\u5f0f\u3067\u306e\u5909\u63db\u306fextreem\u306e\u5b58\u5728\u3092\u5909\u3048\u306a\u3044\u305f\u3081\u3001\u3053\u306e\u7279\u6027\u306f\u5143\u306e\u95a2\u6570\u306b\u3082\u9069\u7528\u3055\u308c\u307e\u3059 f {displaystyle f} \u3002\u4fc2\u6570 k {displaystyle k} \u5143\u306e\u95a2\u6570\u306e\u5c0e\u51fa\u306e\u5224\u5225\u306e\u53cd\u5bfe\u306e\u5146\u5019\u3067\u3059 f {displaystyle f} \u3002 \u3044\u3064 \u7acb\u65b9\u4f53\u306e\u30d1\u30e9\u30d9\u30eb \u30ad\u30e5\u30fc\u30d3\u30c3\u30af\u95a2\u6570\u306e\u95a2\u6570\u30b0\u30e9\u30d5\u3068\u3001\u56de\u8ee2\u306b\u8d77\u56e0\u3059\u308b\u30ec\u30d9\u30eb\u306e\u66f2\u7dda\u3092\u6307\u3059\u5834\u5408\u3002\u66f2\u7dda\u3092\u898b\u308b\u3068\u304d\u306f\u7ffb\u8a33\u306f\u7121\u95a2\u4fc2\u3067\u3042\u308b\u305f\u3081\u3001\u7acb\u65b9\u4f53\u30dd\u30ea\u30ce\u30fc\u30e0\u306e\u307f\u304c\u5fc5\u8981\u3067\u3059 b = d = 0 {displaystyle b = d = 0} \u5206\u6790\u7684\u306b\u8abf\u3079\u308b\u3002 \u591a\u5206 r {displaystyle r} \u4efb\u610f\u306e\u30ea\u30f3\u30b0\u3002\u7acb\u65b9\u4f53\u306e\u30dd\u30ea\u30ce\u30fc\u30e0\u304c\u904e\u304e\u305f\u3088\u3046\u306b r {displaystyle r} 1\u3064\u306f\u30d5\u30a9\u30fc\u30e0\u306e\u8868\u73fe\u3092\u6307\u3057\u307e\u3059 a \u30d0\u30c4 3+ b \u30d0\u30c4 2+ c \u30d0\u30c4 + d \u2208 r [ \u30d0\u30c4 ] {displaystyle ax^{3}+bx^{2}+cx+din r [x]} \u3068 a \u3001 b \u3001 c \u3001 d \u2208 r {displaystyle a\u3001b\u3001c\u3001din r} \u3068 a \u2260 0 {displaystyle anot = 0} \u3002\u6b63\u5f0f\u306b\u306f\u3001\u305d\u308c\u306f\u30b0\u30ec\u30fc\u30c93\u306e\u591a\u9805\u5f0f\u30ea\u30f3\u30b0\u306e\u8981\u7d20\u3067\u3042\u308a\u3001\u5f7c\u3089\u306f\u306e\u753b\u50cf\u3092\u5b9a\u7fa9\u3057\u307e\u3059 r {displaystyle r} \u5f8c r {displaystyle r} \u3002\u305d\u306e\u5834\u5408 r = r {displaystyle r = mathbb {r}} \u4e0a\u8a18\u306e\u611f\u899a\u306f\u7acb\u65b9\u6a5f\u80fd\u3067\u3059\u3002 \u6edd r {displaystyle r} \u4ee3\u6570\u7684\u306b\u9589\u3058\u305f\u8eab\u4f53\u306f\u3001\u3059\u3079\u3066\u306e\u7acb\u65b9\u4f53\u591a\u9805\u5f0f\u304c3\u3064\u306e\u7dda\u5f62\u56e0\u5b50\u306e\u7a4d\u3068\u3057\u3066\u5d29\u58ca\u3057\u307e\u3059\u3002 \u3088\u308a\u4e00\u822c\u7684\u306a\u306e\u306f\u3001\u7acb\u65b9\u4f53\u30dd\u30ea\u30ce\u30fc\u30e0\u3067\u3059 n {displaystyle n} \u30d5\u30a9\u30fc\u30e0\u306e\u53ef\u5909\u5f0f \u2211 i,j,k=1na i,j,k\u30d0\u30c4 i\u30d0\u30c4 j\u30d0\u30c4 k+ \u2211 i,j=1nb i,j\u30d0\u30c4 i\u30d0\u30c4 j+ \u2211 i=1nc i\u30d0\u30c4 i+ d \u2208 r [ \u30d0\u30c4 1\u3001 … \u3001 \u30d0\u30c4 n] {displaystyle sum _ {i\u3001j\u3001k = 1}^{n} a_ {i\u3001j\u3001k} x_ {i} x_ {j} x_ {k}+sum _ {i\u3001j = 1}^{n} b_ {i\u3001j} x_ {i} x_ {i} x_ {i}+sum+ } x_ {i}+din r [x_ {1}\u3001ldots\u3001x_ {n}]} \u3001 \u3059\u3079\u3066\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c a \u79c1 \u3001 j \u3001 k {displaystyle a_ {i\u3001j\u3001k}} \u30bc\u30ed\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30dd\u30ea\u30ce\u30fc\u30e0\u306f\u306e\u753b\u50cf\u3092\u5b9a\u7fa9\u3057\u307e\u3059 r n {displaystyle r^{n}} \u5f8c r {displaystyle r} \u3002\u5f7c\u3089\u306e\u30bc\u30ed\u4f4d\u7f6e r n {displaystyle r^{n}} \u306e\u305f\u3081\u306b\u306a\u308a\u307e\u3059 n = 2 {displaystyle n = 2} \u30ad\u30e5\u30fc\u30d3\u30c3\u30af\u66f2\u7dda\u3068\u3057\u3066\uff08\u66f2\u7dda\u306b\u6955\u5186\u66f2\u7dda\u3068\u3057\u3066\u7279\u7570\u6027\u304c\u306a\u3044\u5834\u5408\uff09\u304a\u3088\u3073 n = 3 {displaystyle n = 3} \u7acb\u65b9\u5730\u57df\u3068\u547c\u3070\u308c\u307e\u3059\u3002 (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4"},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/all2jp\/wiki10\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/all2jp\/wiki10\/archives\/523#breadcrumbitem","name":"\u7acb\u65b9\u6a5f\u80fd – \u30a6\u30a3\u30ad\u30da\u30c7\u30a3\u30a2"}}]}]