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      F(xin)ڵλǣӰҕCˇ

      ֥ZՓӽQİ,"֥ZՓ"e?

      2020-10-15 14:14ӰҕCˇ

      e˕rg ӵwӵw׷׷sȑ(yng)ԓ_(d)׷߳l(f)֮c˕r׷ѽ(jng)ǰһξx˱׷߿ǰD֥Zf@ӵՓd֮ ֥ZՓӽQİ...

      e˕rg

      ӵwӵw׷׷sȑ(yng)ԓ_(d)׷߳l(f)֮c˕r׷ѽ(jng)ǰһξx˱׷߿ǰ

      D֥Zf@ӵՓd֮СЦT¾@ՓÁЦ"(sh)W(xu)"Į_(d)˹" 1-0.999...>0"˼

      Ȼ@ՓЦČW(xu)֥Z"1-0.999...=01-0.999...>0"˼֥Z@Փ^ЦTµ"1-0.999...=01-0.999...>0"˼

      ϳȔ(sh)W(xu)ĽQkǏĽY(ji)^̵ġՓ߉݋]e֮cHh(yun)@֥Zc҂ȡ˲ͬĕrgϵy(tng)

      ˂(x)Tڌ\ӿrgBm(x)(sh)֥ZĽጄtȡxɢĕrgϵy(tng)oՓrggȡСrgSɟo޵ĕrgcMɵQԒfBm(x)rgxɢrgrggȡoFСĘO

      Mܿȥ҂Ҫ^1/21/41/8ȵȣh(yun)oFoM䌍rgDŽٵģ1/21/41/8룬rgԽԽȥoFoM䌍ֻǂ(sh)Ҳ1f֥ZՓDzڵġ

      U(ku)չYϣ

      ՓڱӛځʿµġW(xu)һж֪֥Z@ЩՓǞ֧ώTP(gun)ڡڡӡһČW(xu)f@ЩՓăɂǣ˹ܲ^͡wʸӡ

      @Щ΢e֣oޣĸ߀ǟo΢eֽQ΢eԭڵǰǴڏVӣ磬ЏVӵľν(jng)^o޷ָ߀ЏVӵľνMɟoVӵcMɡ֥ZՓмȳJ(rn)Vӣ֏(qing){(dio)oVӵc

      @ЩՓ֮yԽQЏ(qing){(dio)ѿ٤ɣϞęC(j)еՓķc

      YϣٶȰٿơ֥ZՓ

      -

      ǸP(gun)֥ZՓĆ

      һж?x)wY(ji)rg}簢˹ٶ10m/sٶ1m/sǰ100סǰ˹һ100/9(ni)׷Ϟ(j)Փ߉݋100/9ԟo޼(x)o҂һN҂ƺδ^ӡ

      Œ@һ룬҂Ҫ(jng)^ǰ1/2ǰһһ1/4룬һ1/8҂h(yun)һ(ni)oՓΕrgٶҲɟo޼(x)֡䌍҂ľh(yun)Ҳ^@1ˆ

      @ȻǡMܿȥ҂Ҫ^1/21/41/8ȵh(yun)oFoM䌍rgDŽٵģ1/21/41/8rgԽԽȥoFoM䌍ֻǂ(sh)Ҳ1롣f֥ZՓDzڵ

      U(ku)չY:

      ֥ZՓǹϣD(sh)W(xu)֥ZһϵP(gun)\ӵIJɷԵ܌W(xu)Փӵİl(f)F(xin)@ЩՓѽ(jng)õƵĽQ@ЩՓڱӛځʿµġW(xu)һж֪

      ֥Z@ЩՓǞ֧ώTP(gun)ڡڡӡһČW(xu)f@ЩՓăɂǣ˹ܲ^͡wʸӡ

      @Щ΢e֣oޣĸ߀ǟo΢eֽQ΢eԭڵǰǴڏVӣЏVӵľν(jng)^o޷ָ߀ЏVӵľνMɟoVӵcM֥ZՓмȳJ(rn)Vӣ֏(qing){(dio)oVӵc@ЩՓ֮yԽQЏ(qing){(dio)ѿ٤ɣϞęC(j)еՓķc

      Y:ٶȰٿƣ֥ZՓ

      ش𱻾W(wng)Ѳɼ{ 䌍҂(j)ЌW(xu)^ğoFfs(sh)֪Rֻһ̾ͿɶeƷ֥ZՓ˹

      10001+0.1+0.01+=1000

      (1+1/9)=10000/9˹ՓוrsϞ

      ˂J(rn)锵(sh)1+0.1+0.01+h(yun)ҲܸFM@ֻ^һeX

      ҂Ӌһ°˹܉׷Ϟ?sh)ĕrg

      t1+0.1+0.01+=

      t

      (1+1/9)=10t/9

      ֥Zfİ˹׷Ϟ[rgС10t/9@һl

      ڰ˹͞ڲ\ӵrgǛ]Ƶrgͻ10t/9@һlһͻ10t/9@һl˹׷˻^˞

      ˂x(sh)1+0.1+0.01+h(yun)ҲܸFMļԻˣ]п]rg(sh)1+0.1+0.01+Ǻ_(d)ͳ^ (dng)挦@_ʼ˼һЩ}ĕrѽ(jng)_ʼо\\ӵĴԆ}ҪҲĵһ}Ͽ\ӵĴ@ȻȻ֥ZsԺεՓCC\ӲܴҲ@һՓʽCh(yun)ӛ֥ZǹϣDrڐW(xu)ɵҪɆT@W(xu)ɵĻ˼ǷJ(rn)F(xin)еκ\׃J(rn)ֻ挍ڵıF(xin)֥ZC^cһO(sh)ՓCw\дڵ˲y1.1 ׷Ϟ֥ZՓC@ӵģ׷Ϟȵ_(d)_ʼܵλ(dng)㵽_(d)_ʼܵλÕr@Εrgѽ(jng)ܵǰȥ(dng)ȥ׷rRͬӵĆ}ԱҪܵ˿̵λãܵ˞ǰƄmȻȞܵÿ죬Ҳֻܰ^uƽ@ӵ^̌o޴εسF(xin)ÿһAΞǰ^޵o@oނAh(yun)Ҳ׷ϞD1 ׷Ϟҽ^׷Ϟ̲סҪqՈe֥ZM(jn)һՓC͟o_ʼ\f׷Ϟ㿴뵽_(d)_ʼܵλͱȵ_(d)@ξxc뵽_(d)@cֱȵ_(d)@һxc˵ȵ@һ^̿ԟo޵M(jn)ȥoɟoނ^㌍H϶ox_cǣҲS˳˼֮ǵM֥ZՓC׶ҪҳՓCеĆ}sסHԏ֥ZՓԁ˂һֱԇDָеe`ȻֱȻ]һȫMĽ[] ֥ZՓ1һJ(rn)֥ZՓĂՓCMǶַ˹wʸӺ\ӈ֥ZȼٶrgͿgBm(x)2ٶ\Bm(x)C@NBm(x)\Dz֥ܵZ˃ɷNrǹwBm(x)\r̓ɂwBm(x)\rD2 ַڹwBm(x)\rһNַC֥ZJ(rn)飬κһwҪAc\ӵBcȵ_(d)ABcCҪ_(d)Ccֱȵ_(d)ACcDͬҪ_(d)Dcֱȵ_(d)ADcȵڕrgͿgBm(x)@һ^̿ԟo޵M(jn)ȥԓwH϶ox_Ac˹wBm(x)\DzܵġD3 ˹ڃɂwBm(x)\r֥ZһQ顰˹Cf˹׷Ϟȵ_(d)_ʼܵλ(dng)_(d)_ʼܵλÕr@Εrgѽ(jng)ܵǰȥˣ(dng)˹ȥ׷rRͬӵĆ}ԱҪܵ˿̵λܵ˞ǰƄmȻ˹ȞܵÿҲֻܰ^uƽ@ӵ^̿ԟo޴εسF(xin)ÿһAΞǰ^ڰ˹o@oނAh(yun)Ҳ׷ϞĶɂwBm(x)\ҲDzܵΣ֥ZٶrgͿgǷٶ\gC@Ng\ҲDzܵģ֥Zͬӿ˃ɷNrwg\r̓ɂwg\rD4 wʸӡڹwg\rˡwʸӡՓC3֥Zf\λõ׃wʸκһrgԪṛһλϣκΕrgԪṛλö]׃κһrgԪṛwʸDzӵģwʸDzӵD5 \ӈڃɂwg\r֥Zˡ\ӈՓCO(sh)ABCwwBCA\ӷ෴ÿһrgԪwBCA\һgԪһrgԪ^wBC֮gƄ˃ɂgԪĶwBCƄһgԪҪ낀rgԪwBAƄһgԪsҪһrgԪһrgԪڰ낀rgԪ@һY(ji)Փ@Dzģ˃ɂwg\ҲDzܵǵ֥ZĽY(ji)Փ@ȻDzÿѵ˶֪ȻՓCsһe`ʲôһO(sh)ǰC׷Ϟ?sh)@ЩO(sh)һ_֥ZļO(sh)rgͿgBm(x)\ҲBm(x)M@ЩO(sh)ƺ@ȻǬF(xin)ƌW(xu)sѽ(jng)ʾܿܲ_ˣ֥ZՓC]І}ô2000ǰѽ(jng)C˕rgg\ӲܶBm(x)@һ@˵ĽY(ji)Փȫ`҂ijR֥Zɹˆ׌҂فһľwՓCԿ֥ZՓCP(gun)IJ(rn)wo(jng)^oFc^(q)gBm(x)r\ӣĸ(j)м(x)zl(f)F(xin)]Уy@һlʮ@ҪM(jn)һfĹS҂ҲJ(rn)wo(jng)^oFc^(q)gϲgٸ׵߀놖֥Z@Ǟʲô(dng)Ȼ֥ZǟoشǾ׌҂һ@Ƿ_҂Ū塰ɡĺx^ɡָ^̵İl(f)ֻҪ޵ĕrg|(zh)ԕrgA(ch)ġ}ɞ飺wǷ܉ޕrg(ni)(jng)^gеğoFc^(q)g(j)rgͿgBm(x)ԼO(sh)޵ĿgПoFc^(q)g޵ĕrgͬӺПoFr̻rg^(q)gγһһһ(yng)P(gun)ϵˣԭtwޕrg(ni)ğoFr̻rg^(q)gͨ^޿gеğoFc^(q)gĶwȻޕrg(ni)(jng)^gеğoFc^(q)gǣwǿԣBm(x)rУ(jng)^oFc^(q)g\ӵ֥Z(j)ƺ@_Ŀ䌍e`ģڏ(qing){(dio)gBm(x)Եͬrs˕rgBm(x)D6 Ro׷ۙ\ӡȻʲô҂һNXJ(rn)wo(jng)^oFc^(q)g@}Ҫ֥ZҲS@NX׌˂?yu)ՓCԻ׌҂ؑһ҂ͨ΁oF^̵ע⵽҂oFɕrDz֪XҪȥ׷ۙɣ׷ۙw(jng)^oFc^(q)gȻ҂׷ۙw(jng)^κһc^(q)gҪ޵ĕrgĶ҂o׷ۙw(jng)^oFc^(q)g҂׷ۙҪoFLĕrg@KwԼ(jng)^oFc^(q)g҂]J(rn)oͨ^R׷ۙ^̌HҲoҵĸԴһһNؓ(f)صĸXɣ\ӆ}䌍yǵģЕrx𰸃Hһ֮b^ȥ˼͕P(gun)IǷԸ໨һcrg˼⿂䐂֮ǰͬһNԵĽ(jng)vJ(rn)RԼ׌ɞһԵǻ۵F(xin)ڣһ_ŲԼ׷ϞĵףR1.3 \ӵ 1׿ԟo޷һW(xu)1/0=oԽM1СL01ҲͲ@dž}ڡ

      CСLȣ(sh)W(xu)ԴĘģʽ

      СL0.000.1

      ӽ1Ĕ(sh)0.999.9

      1/3=0.333...3

      0.999...9 =0.333...3+0.333...3+0.333...3= 1/3 + 1/3+ 1/3 = 1

      0.999.9 1

      0.000.110.999.9 1 1ʽ 0

      C 0.000.1СLȆλ 0

      fʲôLȲgڣrgֻ˵룿

      һLȲܶLǟo(sh)СL0.000...1MɵC0԰˹Bһo߳ȥ

      ˵Ĺ̈(zh)Q@}e`ʲô^҂ǰһз挍أ

      X(jng)f^̓҂ǰܸ֪һжɫ•㡢ζ|Mɵ@˶҂^Xڿ^ĴڡN(yn)Կաf߀һ}Ԟ֥ZfһՓȻV˂@挍چ

      ˽Ҫݚ㌦J(rn)֪ 1׿ԟoް딵(sh)W(xu)1/0=oԽM1СL01Ͳ@dž}

      CСLȣ(sh)W(xu)ԴĘģʽ

      СL0.000.1

      ӽ1Ĕ(sh)0.999.9

      1/3=0.333...3

      0.999...9 =0.333...3+0.333...3+0.333...3= 1/3 + 1/3+ 1/3 = 1

      0.999.9 1

      0.000.110.999.9 1 1ʽ 0

      C 0.000.1СLȆλ 0

      fʲôLȲgrgڣֻ˵

      һLȲܶLǟo(sh)СL0.000...1MɵģC0԰˹Bһo߳ȥ

      ˵Ĺ̈(zh)Q@}e`ʲô^҂ǰһз挍أ

      X(jng)f^̓҂ǰܸ֪һжɫ•㡢ζ|Mɵ@˶҂^Xڿ^ĴN(yn)Կաf߀һ}Ԟ֥ZfһՓȻV˂@挍چ᣿

      ˽᣿Ҫݚ㌦J(rn)֪

      ֻC_ @̲Փķg

      @Փe`֮̎gDzܟoBm(x)ָ

      Ҫ@}̫ЌW(xu)W(xu)ij͕ˣ涼DzBm(x)

      䌍ҲŸЮI(y)@}Ҳ(jng)_ ֥ZzenonʢڹԪǰ468꣩ǰTµČW(xu)ᘌW၆ɻԭ^J(rn)\ӿԵĂՓCĘOՓccfǰTŒW(xu)ffǞ˾So(h)T(qing){(dio)ȡijC^DڡTƪfqo(h)ǡ֮߀֮ԑyfJ(rn)Dz׃һôóﲻ\ӵĻևY(ji)ՓtfJ(rn)׃ôҲóﲻ\ӵĽY(ji)Փ@cǰìܵՓӻև֥ZՓĂ

      һաַ\_(d)Ŀĵ֮ǰҪȫ̵12_(d)12֮̎ǰҪ12˷ָoFh(yun)Ҳ_(d)Ŀĵ

      աِ͞ܡO(sh)Wƥِܹ܊ِ͞ܣһ·(dng)@·̕rǰһ·(dng)@һΕrǰһһ׷һoFh(yun)ҲsϞ@Փf\]п֮

      աwʸӡwʸһΕrgͨ^һ·@һΕrgɱֳɟo(sh)rÿһrʸռ(j)һλoֹӵfͣv@·̵ĸͬλǏһλwһλ

      աһĕrgһĕrgՓˆDʾ

      A1 A2 A3 A4

      BB2 B3 B4

      C1 C2 C3 C4

      O(sh)Bcϵ\ٶͬABcϵеÿһִСͬôB1_(d)A4ĕrgcC1_(d)A1ĕrgBϵе\ӕrgCϵ\ӕrgһ루AֻƄ˃ɸfϵе\ӕrgBϵ\ӕrgһBƄĸߑ(yng)ԓȅsвeСһrgһrgՓ

      ĂՓǔ(sh)ΑͣՓփ(ni)ݿßoFՔ(sh)бʾ硰ַʾ112121212nnڅoF󣩵Ĕ(sh)mȻ(sh)W(xu)ӋĽY(ji)Ҳ@ʾ@ЩՓe`sǺԎqஔ(dng)̵܌W(xu)x\ӵĔ(sh)W(xu)ʹõ΢e\㽨ڡOޡĻA(ch)֮OޡǡǡԳJ(rn)gԺBm(x)oԺԵĽy(tng)һ(sh)W(xu)s]лش@Щ܉y(tng)һ҂֮ԿáOޡf֥ZՓe`ֻ顰Oޡѽ(jng)A(y)O(sh)c֮෴ǰᡣfOޡĻA(ch)һ}(dng)(sh)W(xu)܌W(xu)е߉݋xOޡɱ߀ԭ̖߉݋ʽ҂ӵ߉݋ZԴ֥ZՓô֥ZՓʽͽ(f)sö

      ֥Z^˼L(fng)״\ՓM(jn)Нy@ЩՓ˂(x)Ԟ鳣\^Bm(x)gࡢo޺wͲֵìȻ܌W(xu)P(gun)һͶ׃׃֮gP(gun)ϵӑՓ֥ZՓ漰\ӌW(xu)J(rn)RS(sh)W(xu)߉݋W(xu)}ښvʷLõ˼ԱՓϵʿ֥ZqCĄ(chung)ʼ@еġ

      Tags֥ZՓ,"֥ZՓ"e?,֥Z