讒倥€�↑螳壽焚, 謇狗カ壹″(蜃ス謨ー)

Maple 縺ァ縺ッ, 謨ー蠑丞�逅��縺溘a縺ョ謇狗カ壹″縺� 2700莉・荳雁ョ夂セゥ縺輔l縺ヲ縺�∪縺�. 縺昴l繧峨r蜈ィ驛ィ隗」隱ャ縺吶k莠九�荳榊庄閭ス縺ァ縺吶�縺ァ, 縺薙%縺ァ縺ッ縺昴�荳€萓九r縺ゅ£縺セ縺�. 縺薙l繧峨�萓九�荳ュ縺ォ蛻晉ュ牙�謨ー縺檎畑縺�i繧後※縺�∪縺吶′, 縺昴l繧峨�諢丞袖縺ッ 螳ケ譏薙↓鬘樊耳縺ァ縺阪k縺ィ諤昴>縺セ縺吶�縺ァ, 縺薙l縺ォ縺、縺�※縺ョ隗」隱ャ縺ッ縺�■縺�■縺励∪縺帙s.

謨ー蠑丞�逅�↓谺�縺九○縺ェ縺�ョ壽焚(蜀�捉邇�ュ�)縺梧里縺ォ螳夂セゥ縺輔l縺ヲ縺�∪縺�. 蜀�捉邇��, Pi縺ィ縺�≧險伜捷繧剃スソ縺�∪縺�. 髢「謨ー縺ォ蛟、繧剃サ」蜈・縺吶k譎ゅ↓縺ッ, 蠢�★諡ャ蠑ァ ( )縺悟ソ�ヲ√〒, 縺励°繧よ焚蠑剰ィ育ョ嶺ク翫�諡ャ蠑ァ縺ッ, 縺薙l莉・螟悶↓縺ッ菴ソ縺医∪縺帙s. { }, [ ]縺ッ蛻・縺ョ諢丞袖縺ォ縺ェ繧翫∪縺�.

> Pi;
> cos(Pi/4);
> tan(Pi/2);
> arctan(-infinity);
$\sqrt{2}$ 縺後◎縺ョ縺セ縺セ蜃コ縺ヲ譚・繧倶コ�, tan 縺ョ荳榊ョ壼€、縺ォ蟇セ縺吶k繧ィ繝ゥ繝シ繝。繝�そ繝シ繧ク 縺ォ豕ィ諢上@縺ヲ荳九&縺�. arctan 縺ッ騾�ュ」謗・蜃ス謨ー, infinity 縺ッ辟。髯仙、ァ縺ョ莠九〒縺�. 譛€蠕後�遲斐�, 讌オ髯仙€、繧貞�蜉帙@縺ヲ縺�∪縺�.

Maple 縺ァ縺ッ, 譛臥炊謨ー, 蜀ェ譬ケ, 蜀�捉邇�ュ峨�螳壽焚縺ッ, 縺昴�縺セ縺セ蜃コ蜉帙&繧後∪縺�. 荳翫�騾�ュ」謗・蜃ス謨ー縺ョ險育ョ励〒繧ゅ◎縺�〒縺吶@, 萓九∴縺ー, $\displaystyle{1+\frac{1}{2^2}+\frac{1}{3^2} + \cdots
= \sum_{n=1}^{\infty} \frac{1}{n^2} = \zeta (2) = \frac{\pi^2}{6}}$ 繧よャ。縺ァ險育ョ励&縺帙k縺ィ, 蜀�捉邇�r菴ソ縺」縺溽ュ斐′蜃コ縺セ縺�.

> sum(1/n^2, n=1..infinity);
縺薙l繧貞ー乗焚縺ク螟画鋤縺吶k縺ォ縺ッ, evalf縺ィ縺�≧謇狗カ壹″繧堤畑縺�∪縺�.
> evalf(Pi^2/6);

Maple縺ァ縺ッ, 髱槫クク縺ォ豁」遒コ縺ェ謨ー蛟、險育ョ励′縺ァ縺阪∪縺�. 萓九∴縺ー, $\displaystyle{e^{\pi\sqrt{163}}-744-640320^3}$繧� C險€隱槭� 謨ー蟄ヲ髢「謨ー縺ァ險育ョ励@縺セ縺吶→ -480 縺ィ縺�≧遲斐r蠕励∪縺�. Maple繧� 菴ソ縺�→, C險€隱槭�險育ョ励′縺ィ繧薙〒繧ゅ↑縺�ェ、蟾ョ繧貞性繧€莠九′繧上°繧翫∪縺�. 襍キ蜍墓凾縺ァ縺ッ, 豬ョ蜍募ー乗焚轤ケ縺ョ莉ョ謨ー驛ィ縺ッ10譯√↓險ュ螳壹&繧後※縺翫j, 縺昴�縺セ縺セ縺ァ縺吶→, 縺薙�邨先棡縺ッ逵溘�蛟、縺ョ邏�40蛟阪→縺�≧遲斐↓縺ェ繧翫∪縺�. 縺昴�縺溘a莉ョ謨ー驛ィ縺ョ譯∵焚繧剃コ句燕縺ォ險ュ螳壹@縺セ縺�. 莉ョ謨ー驛ィ縺ョ譯∵焚縺ッ, Maple 縺ョ繧キ繧ケ繝�Β螟画焚 Digits縺ォ譬シ邏阪&繧後※縺�∪縺吶°繧�, 縺薙�蛟、繧貞、画峩縺励∪縺�. Maple縺ァ縺ッ螟画焚縺ク縺ョ莉」蜈・縺ォ := 繧堤畑縺�∪縺�.

> Digits:=50;
> evalf(exp(Pi*sqrt(163))-744-640320^3);
C險€隱槭�繝ゥ繧、繝悶Λ繝ェ繧堤畑縺�◆險育ョ励′, 逵溘�蛟、縺ョ $6\times 10^{14}$蛟堺サ・荳翫� 蛟、縺ォ縺ェ縺」縺ヲ縺�k莠九′繧上°繧翫∪縺�. (exp 縺ッ exponential 縺ョ逡・)

隱イ鬘�(髮」):
  $\displaystyle{e^{\sqrt{163}\pi}}$縺ョ蛟、縺梧紛謨ー縺ォ霑代>逅�罰繧� 隱ソ縺ケ繧�. 闖�↓縺薙l繧偵″縺。繧薙→隱ャ譏弱〒縺阪k莠コ縺ッ, 蜊呈・ュ縺セ縺ァ遘√′諡�ス薙☆繧狗ァ醍岼縺ョ蜈ィ縺ヲ縺ョ蜊倅ス阪r (謗域・ュ逋サ骭イ縺吶l縺ー) A 縺ァ縺ゅ£縺セ縺�. (蜷後§逅�罰縺ァ, $\displaystyle{e^{\sqrt{67}\pi}}$ 繧よ紛謨ー縺ォ霑代>.)

譁�ュ怜シ上�螻暮幕, 蝗�謨ー蛻�ァ」繧ょ庄閭ス縺ァ縺�.

> expand((x+y)^5);
> factor(a^8-b^8);

谺。縺ョ蝠城。後�, 2000蟷エ縺ョ逅臥帥螟ァ蟄ヲ蜈・蟄ヲ隧ヲ鬨灘撫鬘悟燕譛滓律遞区焚蟄ヲ逕イ縺ョ\fbox{1}縺ァ縺�.

  1. 髢「謨ー $\displaystyle{\frac{x}{\sqrt{1+x^2}}}$繧貞セョ蛻�○繧�.


  2. 荳榊ョ夂ゥ榊� $\displaystyle{\int x\sqrt{x^2+2}~dx}$繧呈アゅa繧�.


  3. 螳夂ゥ榊� $\displaystyle{\int_{\frac{1}{e}}^{2e} x^3\log x~dx}$繧呈アゅa繧�.


  4. $\displaystyle{\lim_{x \to 0}\frac{\sqrt{2x+1} - 1 - x}{x^2}}$繧呈アゅa繧�.
縺薙�繧医≧縺ェ蜊倡エ斐↑險育ョ励�, Maple 縺ッ蠕玲э縺ァ縺�. (隧ヲ鬨薙〒縺ッ, 遲斐□縺代r譖ク縺�※繧よコ€轤ケ縺ォ縺ッ縺ェ繧峨↑縺�→諤昴>縺セ縺�.) Maple 縺ァ縺ッ, 逶エ蜑阪�邨先棡繧�%縺ァ蜿ら�縺ァ縺阪∪縺�.
> diff(x/sqrt(1+x^2),x);
> simplify(%);
> int(x*sqrt(x^2+2),x);
> int(x^3*log(x), x=exp(-1)..2*exp(1));
> limit((sqrt(2*x+1)-1-x)/x^2, x=0);

譁ケ遞句シ� f(x) = 0 縺ョ隗」繧呈アゅa繧区ァ倥€�↑譁ケ豕輔b Maple 縺ォ縺ッ逕ィ諢上&繧後※縺�∪縺�. f(x) 縺� 4谺。莉・荳九�螟夐��シ上↑繧�, 縺薙�譁ケ遞句シ上↓縺ッ 莉」謨ー逧�↑隗」豕輔′蟄伜惠縺吶k莠九′遏・繧峨l縺ヲ縺�∪縺�. (3蟷エ縺ョ莉」謨ー蟄ヲ I繝サII 縺ァ蜍牙シキ縺吶k莠亥ョ壹〒縺�.) Maple 縺ッ縺薙l繧峨�隗」豕輔r遏・縺」縺ヲ縺翫j, solve 縺ィ縺�≧謇狗カ壹″縺ォ 縺ェ縺」縺ヲ縺�∪縺�. 谺。繧貞ョ溯。後@縺ヲ縺ソ縺ヲ荳九&縺�. 縺薙l繧峨�隗」縺ォ縺ッ隍�エ�謨ー縺悟性縺セ繧後∪縺吶′, Maple 縺ァ縺ッ陌壽焚蜊倅ス阪�螟ァ譁�ュ励� I 縺ァ陦ィ遉コ縺輔l縺セ縺�.

> solve(x^3+1,x);
> solve(x^3+3*x+1,x);

5谺。莉・荳翫�譁ケ遞句シ上↓縺ッ, 莉」謨ー逧�↑隗」豕輔′荳€闊ャ縺ォ縺ッ蟄伜惠縺励↑縺�コ九′ 遏・繧峨l縺ヲ縺�∪縺�(莉」謨ー逧�→縺�≧蛻カ髯舌r螟悶○縺ー, 蛻・縺ェ隗」豕輔�縺ゅj縺セ縺�). 谺。繧貞ョ溯。後@縺ヲ縺ソ縺ヲ縺上□縺輔>.

> solve(x^5+x^2+1, x);
RootOf($\_Z^5+\_Z^2+1$) 縺ィ縺�≧隗」縺悟�縺ヲ譚・縺セ縺�. 繧ゅ■繧阪s, 縺薙l縺ッ 蜊倥↑繧九ヨ繝シ繝医Ο繧ク繝シ縺ォ驕弱℃縺ェ縺��縺ァ縺吶′, Maple 縺ッ莉」謨ー逧�焚繧呈桶縺医k縺ョ縺ァ, 縺薙�隗」(莉」謨ー逧�焚)繧堤畑縺�◆險育ョ励′莉雁セ瑚ィ伜捷逧�↓蜿ッ閭ス縺ァ縺�.

莉」謨ー逧�↑隗」豕輔′縺ゅk蝣エ蜷医〒繧�, 縺昴�隗」豕輔′隍�尅縺ェ蝣エ蜷医↓縺ッ, 谿句ソオ縺ェ縺後i莉」謨ー逧�↑隗」繧貞�蜉� 縺励∪縺帙s. 萓九∴縺ー, 1縺ョ 7荵玲�ケ繧定ィ育ョ励&縺帙h縺�→縺励※繧�, de Moivre (繝� 繝「繧「繝悶Ν) 縺ョ蜈ャ蠑上°繧牙�縺ヲ縺上k隗」縺悟腰邏斐↓蜃コ蜉帙&繧後k縺�縺代〒縺�.

> solve(x^7-1, x);
荳翫〒霑ー縺ケ縺溘h縺�↓ Maple 縺ァ縺ッ, 莉」謨ー逧�焚縺梧桶縺医∪縺�. 縺薙l繧貞茜逕ィ縺吶k縺ィ, $x^7-1=0$ 縺ョ莉」謨ー逧�↑隗」繧よアゅa繧倶コ九′縺ァ縺阪∪縺�. $\displaystyle{x^7-1=(x-1)(x^6+x^5+x^4+x^3+x^2+x+1)}$ 縺ァ縺吶′, 遨阪�蜿ウ蛛エ縺ョ 6谺。蠑上� $\displaystyle{\sqrt{-7}}$ 繧剃スソ縺�→, 2縺、縺ョ 3谺。蠑上�遨阪↓蝗�謨ー蛻�ァ」縺輔l縺セ縺吶€� 縺薙�讒倥↑蝗�謨ー蛻�ァ」縺ッ, 莉倥¢蜉�縺医k謨ー繧� factor 縺ョ隨ャ2蠑墓焚縺ォ 蜉�縺医k莠九〒蜿ッ閭ス縺ァ縺�.
> factor(x^6+x^5+x^4+x^3+x^2+x+1, (-7)^(1/2));
蠕薙▲縺ヲ, 1縺ョ隍�エ�7荵玲�ケ縺ッ, 谺。縺ョ2縺、譁ケ遞句シ上�隗」蜈ィ菴薙〒縺�.
> solve(2*x^3+x^2-I*sqrt(7)*x^2-x-I*sqrt(7)*x-2,x);
> solve(2*x^3+x^2+I*sqrt(7)*x^2-x+I*sqrt(7)*x-2,x);

f(x) 縺� 5谺。莉・荳翫�螟夐��シ上d, 螟夐��シ丈サ・螟悶�蝣エ蜷医↓縺ッ, 荳€闊ャ逧�↑ 隗」豕輔′蟄伜惠縺励∪縺帙s. 縺薙�繧医≧縺ェ譁ケ遞句シ上�霑台シシ隗」繧呈焚蛟、逧�↓險育ョ励☆繧区婿豕輔b Maple 縺ッ遏・縺」縺ヲ縺�∪縺�. 荳翫�譁ケ遞句シ上�謨ー蛟、隗」繧�, 谺。縺ァ險育ョ励@縺ヲ縺上l縺セ縺�.

> fsolve(x^5+x^2+1, x);
螳滄圀, 髢「謨ー縺ョ繧ー繝ゥ繝輔r謠冗判縺吶k plot 繧剃スソ縺」縺ヲ,
> plot(x^5+x^2+1,x=-5..5);
> plot(x^5+x^2+1,x=-2..0);
遲峨r螳溯。後@縺セ縺吶→, fsolve 縺ァ豎ゅa縺溷€、縺� $x^5+x^2+1=0$ 縺ョ 蜚ッ 1 縺ョ螳滓焚隗」縺ョ霑台シシ蛟、縺ァ縺ゅk莠九′繧上°繧翫∪縺�.

student
2019-07-05