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  • С(sh)W(xu)ؿ}

    rg2022-09-22 17:15:43 С ҪͶ
    • P(gun)]

    С(sh)W(xu)ؿ}ͅR

    г̆}СԇСW(xu)ĴِĴ}֮һ(Ӌ(sh)Փ׺г)w}׃γ10N}иصĽ}

    С(sh)W(xu)ؿ}ͅR

    С(sh)W(xu)ؿ} ƪ1

    һһ׷}

    һ˻߶˕r(ͬrr)(ͬ)(ͬ)ĕrg;xȗlϳF(xin)г̆}ڱِдF(xin)sռ80%h쾚(yng)Ø(bio)(zhn)ⷨs=vtY(ji)Ϙ(bio)(zhn)ήD()ֻõ׷ĻʽɽQڽ}ĕrһF(xin)^r׃rY(ji)ԼĈDֶȥr

    (f)s׷}

    (1)׷}һ׷}һ\ӌһ҂׷}}˼·ȫһӣֻ(f)scP(gun)Iǘ(bio)(zhn)Dܷߵ\ӠB(ti)

    (2)׷}ɂһ·ͬrͬػͬrط(f)׷׷Q(f)v͆}֞(bio)(zhn)(֪ɵؾx̓ٶn׷cضcľxҎ(gu)rg(ni)׷Δ(sh))ͼچ}(Ҋ֪ٶһں߶صʼcr׷ĴΔ(sh))

    (bio)(zhn)ͽ̶ⷨ܏·֣ܷһ_ʼλ׷rgķxʹΔ(sh)׵ö۾ʾDֻܴЂJ(rn)Rowó𰸣Ƿǿԇrgм(x)(bio)(zhn)ߴD

    һõĕrgʽ(ֻeҏăɶͬrl(f)rͬһ˳l(f)rҊԲ٘)

    γrgtγ=s/(v+v)

    γ׷rgtγ׷=s/(v-v)

    nrgtn= tγ(2n-1)

    m׷rgtm= tγ׷(2m-1)

    ޶rg(ni)Δ(sh)NΔ(sh)=[ (tn+ tγ)/2 tγ]

    ޶rg(ni)׷Δ(sh)M׷Δ(sh)=[ (tm+ tγ׷)/2 tγ׷]

    ע[]ȡ̖

    ֮xȡ׻ҁоP(gun)·̵P(gun)ϵ漰چ}ҪעҪ\ӷeˡ

    }҃܇ͬrAسl(f)300ǧ׵ABɵ֮g֪܇ٶÿСr30ǧ܇ٶÿСr20ǧ ס

    (1)ڶӭֽ(jng)^Lrg׷?(2)rxcǧ?(3)50Сr(ni)҃܇ӭٴ?

    ܇}

    co漰܇LС}ͷ֞飺

    1܇^()һLٶһL]ٶȣ

    ⷨ܇܇L+()L(·) =܇ٶȡͨ^ĕrg;

    2܇+(늾U)һLٶһ]Lȡ]ٶ

    ⷨ܇܇L(·)=܇ٶȡͨ^rg;

    3܇+ˣһLٶһ]Lٶȣ

    (1)܇+ӭߵˣஔ(dng)}

    ⷨ܇܇L(·) =(܇ٶ+˵ٶ)ӭe^ĕrg;

    (2)܇+ͬߵˣஔ(dng)׷}

    ⷨ܇܇L(·) =(܇ٶ-˵ٶ) ׷ĕrg;

    (3)܇+ڻ܇ϵˣ܇c˵׷}

    ⷨ܇܇L(·) =(܇ٶȡ˵ٶ) ӭe^ĕrg(׷ĕrg);

    4܇+܇һLٶһҲLȡٶ

    (1)e܇}ஔ(dng)}

    ⷨ܇܇L+܇܇L(·) =(܇ٶ+܇ٶ) e܇rg;

    (2)܇}ஔ(dng)׷}

    ⷨ܇܇L+܇܇L(·) =(܇ٶ-܇ٶ) e܇rg;

    ڻ܇^򡢻܇܇׷Լ܇ͻ܇֮g׷ȵ@׷N͵}Ŀڷ}ĿĕrһýY(ji)DM(jn)

    ˮд}

    ٶȣˮд}ҲͲyӛס1ʽ

    ?bio)?oˮ+ˮٶͿ현ƌ(do)ʽ

    ˮ=oˮ-ˮٶȣ

    oˮ=(?bio)?ˮ)2

    ˮٶ=(?bio)?ˮ )2

    ԽY(ji)Փ£

    (1)׷ˮٶȌ׷ĕrg]ӰoՓͬ߀ăɴٶȲ(gu)ɡ{đʹÞ

    2)ˮƯٶ=ˮٶȣt1= t2(t1ﵽl(f)F(xin)ĕrgt2İl(f)F(xin)ʰĕrg)cˮПoP(gun)˽Y(ji)Փĕrgʽdz׵ĽQˮ}䱾Ҳdzӛ

    }һlм҃ɂa^״a^Ҵa^50ǧ̎һҿʹһ؛քeļ҃ɴa^ͬrl(f)ɴoˮٶͬ ʹl(f)rһƷĴˮ10犺Ʒʹ5ǧʹ20ǧ׺^׷sƷ׷ϕrǡú؛ˮٶ

    塢gl(f)܇}

    g@yC^̌ٽ}]Ўһ3ʽһ㆖}ӭж

    (1)ڰ܇?yn)}ûʽQٵĽֱⷨӮrg-xDٮĽ澀Ҫ(sh)c(sh)ɡ

    }ABǹ܇ăɂ܇վAվBվ·ÿ8c11cABվÿ30ͬrl(f)һv܇֪AվBվ γҪ105BվAվγҪ80犡830900Aվl(f)܇˾C(j)քeܿvBվ_܇?

    (2)ڰ܇“(lin)3ʽʹ

    ܇g=(܇ٶ+ٶ)¼rgg

    ܇g=(܇ٶ-ٶ)׷¼rgg

    ܇g=܇ٶȡ܇l(f)܇rgg

    12ϲ⣬

    ܇g=ٶȡ?x)rgg

    ֞2С}ͣ

    1һgl(f)܇}3ʽѸ;

    2_(d)Ŀĵغ׷Ĺ܇v(sh)(bio)(zhn)ǣD-Mܶ3ʹʽ-Y(ji)sȫ=vt-Y(ji)ֲ䆖}(sh)(sh)

    }СT܇ȥСҾە·ע⵽ÿ9犾һv܇ĺ󷽳ԽССT܇·܇ֻ܇ȥС@rС ְl(f)F(xin)܇Ҳÿ9犳Խһv܇֪܇ٶСT܇ٶȵ5@3N܇v^жք٣ô܇վÿٷ l(f)һv܇?

    ƽٶȆ}

    ׵}͡ʽҪӛ·=ƽٶȡrgs=vt(yng)ıҪֱӌʽⲢҎ(gu)γг̆}Ľy(tng)һQ

    ߡh(hun)ܵ}

    һ(zhn)Ժyȵ}֞顰ͬһ·ͬ·挍ܷ񿴵С} 漰چ}׺λÆ}(}м(x)©Nλÿ)ʽ}(ᘌܷ񿴵}ܷھεĹս̎)

    犱톖}

    ǭh(hun)Ά}ضP(gun)ϵʽv= 12vr

    (1)Y(ji)ӛrÿ1/120.5;ÿ16rᘺͷᘡ롱칲غ11ֱ11ֱǹ22(ʲôλҪԼñDY(ji))

    (2)}˼··̲˼·

    ()=(r)+()

    x=x/12+(_ʼrrᘵ'+Kֹr^rᘵĸ)

    ǣ6x=x/2+(_ʼrrᘵĽǶ+Kֹr^rᘵĽǶ)

    ԽQ󲿷֕rᘆ}}غֱǡֱǶȡăɂgһrγɶٽǶ

    }9c23֕rrᘺͷᘵĊAǶٶ?@һr_ʼ(jng)^ٷrᘺͷᘵһδֱ?

    (3)犆}õĽQѽ(jng)г̆}׃ɱ}(yng)ıʽ

    Ԅӷ݆}

    ȻûP(gun)ϵʽsݼ(sh)=(vˡv)tϻ½Q@·̆λȫǡΨһҪעtϻҪʾɌHߵļ(sh)/˵ٶ

    }̈ԄӷԄɂķ߄ӣŮкY(ji)Ů40_(d)ϣк80_(d)кλrg(ni)ߵķݼ(sh)Ů2t(dng)ԓoֹrɿķݼжټ?

    ʮʮ·چ}

    ڲͬϵг̆}]Ľ}ɣֻҪόшDͨ^׺ηͿԽQλLε·ϵг̆}

    ʮһУ܇}

    @һ}У܇У܇ؽ鲻ಽк܇Kͬr_(d)Ŀĵ(_(d)Ŀĵص̕rgҪC)4NС}ͣ(j)У܇ٶ(زͬ)༉ٶ(ͬ಻ͬ)(sh)Ƿ׃

    (1)܇ٲ׃-ٲ׃-(sh)2(Ҋ)

    (2)܇ٲ׃-ٲ׃-(sh)

    (3)܇ٲ׃-׃-(sh)2

    (4)܇׃-ٲ׃-(sh)2

    (bio)(zhn)ⷨD-3ʽӣ

    1rg=һ܇ĕrg+@鲽еĕrg;

    2܇ߵĿ·;

    3һ鲽еĕrg=܇ͬrl(f) ĕrg

    õׂ·̶εıֵٸ(j)(sh)

    }װcҰW(xu)ͬrČW(xu)Уl(f)ȥ15ǧĹ@҃ɰIJٶȶÿСr4ǧW(xu)Уһv܇ٶÿСr48ǧ ף@v܇ǡһČW(xu)ʹɰW(xu)̕rg(ni)_(d)@ôװW(xu)cҰW(xu)ҪеľxǶǧ?

    ʮC

    }ABҪɳĮ̽UÿɳĮ̎20ǧ֪ÿԔyһ 24ʳˮ(zhn)ʳ;һh(yun)ɳĮǧ(Ҫ˷سl(f)c)?@}䌍ܑ(yng)}h (do)ӛY(ji)ՓԱ㿼ԇÿ˿Ԏtʳh(yun)ߵĕrgT

    (1)(Cһߵh(yun)˶Ҫ؁)

    1ˣ;ʳT=2/3t;;ʳT=3/4t

    2ˣ

    (2)ɳĮ(Cһ˴^ɳĮ؁ˣ˶Ҫ؁)n(ɳĮ)1˴ɳĮ

    1;ʳT[2n/(n+1)]tTǴɳĮҪ씵(sh)

    2;ʳT=(1+1/3+1/5+1/7++1/(2n-1))t

    С(sh)W(xu)ؿ} ƪ2

    1Ͳ} ֪ɔ(sh)ĺc@ɂ(sh)

    ֪ɔ(sh)102@ɂ(sh)

    E

    ͼϲԽԽ;2Ǵ;

    ͜pȥԽpԽС;2С

    Et(sh)=(10+2)2=6С(sh)=(10-2)2=4

    2Ȇ}

    ה(sh)Ҕ(sh)12Ҽ:=74ɔ(sh)

    E

    ҵı(sh)

    ӌHĸ(sh)

    һģԸԵı(sh)ɔ(sh)

    һ12(7-4)=4

    Լה(sh)飺4X7=28Ҕ(sh)飺4X4=16

    3g}

    E

    g׃ͬrӜp

    q(sh)һ׃(sh)Ҳ׃

    ץס@cһж

    1С܊8 qְֽ34qְֵgС܊3?

    q׃Ěq(sh)c34-8=26Ȼ׃֪(sh)D(zhun)Ȇ}

    26(3-1)=13ְֵg13X3=39qС܊g13X1=13qԑ(yng)ԓ5

    213qܵܽ9q(dng)܂zq(sh)ĺ40qr˸(yng)ԓǶٚq?

    q׃Ěq(sh)13-9=4Ҳ׃q(sh)40q(sh)4D(zhun)Ͳ}

    tĚq(sh)(40+4)2=22ܵܵĚq(sh)(40-4)2=18Դ9

    4ͱȆ} ֪w󲿷

    ұ(sh)͞27::=2:3:4ұ(sh)

    E

    Ҫ˺ּԭt

    ĸȔ(sh)ͣԼ

    ͳԱԓõ

    ĸȔ(sh)ĸ飺2+3+4=9;

    Լtұ(sh)ռ͵ıքe293949;

    ͳԱtמ27X29=6Ҟ27X39=927X49=12

    5uͬ\}

    uͬ\^36 _120uÔ(sh)

    E

    O(sh)ȫuO(sh)ȫ

    ˎֻ_ˎֻ?

    _IJuÔ(sh)

    ÕrO(sh)ȫutӔ(sh)=(120-36X2)(4-2)=24

    urO(sh)ȫãtu(sh) =(4X36-120)(4-2)=12

    6 ·̆}

    (1)}

    ҃ˏ120ǧ׵ăɵ׵ٶȞ40ǧ/СrҵٶȞ20ǧ/Сrٕrg?

    E

    һ·ȫ^

    ٶȺͰѕrgá

    һ·ȫ^^·̺ǡǃɵصľx120ǧ

    ٶȺͰѕrgã҃˵ĿٶȞ˵ٶ֮40+20=60(ǧ/Сr)ĕrg͞12060=2(Сr)

    (2)׷}

    ܶˏļȥ(zhn)㲽ٶȞ3ǧ/Сr2СrܵT܇l(f)ٶ6ǧ/Сrוr׷?

    E

    BҪwS׷

    ߵ·ٶȲrg

    ߵ·̣3X2=6(ǧ)

    ٶȵIJ6-3=3(ǧ/Сr)

    ׷ϵĕrg63=2(Сr)

    7 Ȇ}

    (1)ˮϡ

    20ǧ˝Ȟ15%ˮˮǧ˺׃?yu)?0%?

    E

    ˮˮ

    ˮpˮǼˮ

    ˮԭǞ飺20X15%=3(ǧ)

    ˮ3ǧ10%‘(yng)жˮ310%=30(ǧ)

    ˮpˮˮpȥԭˮ30-20=10(ǧ)

    (2)ǝ⻯

    20ǧ˝Ȟ15%ˮǶǧ˺׃?yu)?0%?

    E

    ˮˮˮ

    ˮpˮ}

    ˮԭˮ飺20X(1-15%)=17(ǧ)

    ˮˮ17ǧˮ20%‘(yng)жˮ17(1-20%)=21.25(ǧ)

    ˮpˮˮٜpȥԭˮ21.25-20=1.25(ǧ)

    8̆}

    һ헹̣׆Ϊ4҆Ϊ6ͬr2҆Ϊ?

    E

    ̿O(sh)11ԕrgǹЧ

    ΪrЧԼһRrЧDZ˵Чʺ͡

    1pȥѽ(jng)ıǛ]]'ԹЧʾǽY(ji)

    [1-(16+14)X2](16)=1()

    9ֲ䆖}

    E

    ֲٿãҪ·?

    ֱĜpȥ1AǽY(ji)

    1һlL120׵R·ֲg4ֲٿ?

    ·ֱģtֲ1204-1=29()

    2һlL120׵ĈAλ߅ֲg4ֲٿ?

    ·LjAtֲ1204=30()

    10ӯ̝}

    E

    ȫӯȫ̝ĜpȥС;һӯһ̝ӯ̝һ

    ԷIJY(ji)ǷĖ|ˡ

    1Сѷÿ109;ÿ87жСѶ?

    һӯһ̝tʽ飺(9+7)(10-8)=8()(yng)Ӟ8X10-9=71()

    2ʿӏÿ45l(f)t680l(f);ÿ50l(f)t200l(f)ʿӏ?

    ȫӯ}tĜpȥСģʽ飺(680-200)(50-45)=96()(yng)ӏ96X50+200=5000(l(f))

    3W(xu)l(f)ÿ10t90;ÿ8 t8ٌW(xu)ٕ?

    ȫ̝}tĜpȥСʽ飺(90-8)(10-8)=41()(yng)41X10-90=320()

    11(sh)}

    r犬F(xin)ڱʾĕrg18cD(zhun)1990Ȧǎc?

    E

    (sh)(N-1)С1(N-1)

    ׃rҪֻҪ

    D(zhun)һȦ1СrD(zhun)24ȦǕrD(zhun)1ȦҲǕrᘻصԭλ198024(sh)22ஔ(dng)ڷǰD(zhun)22ȦǰD(zhun)22Ȧஔ(dng)ڕrǰ22Сrrǰ22СrҲஔ(dng)24-22=2Сrஔ(dng)ڕr2Сrrஔ(dng)18-2=16(c)

    12ţԲ݆}

    E

    ÿţÿijԲO(sh)Ƿݔ(sh)1A^BijԲǎ?M^NijԲǎ?ĜpȥСģԶߌ(yng)씵(sh)IJֵY(ji)DzݵLԭеIJ˷

    ʽA^BijԲpȥBԲݵLδ֪Բţ֞ɂ֣һСȳ²(sh)Dzݵı;еIJʣţ(sh)͌Ҫ씵(sh)֪

    ϲLһܣһӿ27^ţ6԰Ѳݳ;23^ţ9Ҳ԰Ѳݳ21^Ѳݳ

    ÿţÿijԲO(sh)1t27^ţ6ijԲ27X6=16223^ţ9ijԲ23X9=207;

    ĜpȥС207-162=45;ߌ(yng)씵(sh)IJֵ9-6=3()tݵL453=15(ţ/);

    ԭеIJ˷ơ

    ʽA^BijԲpȥBԲݵLʡ

    ԭеIJ=27X6-6X15=72(ţ/)

    δ֪Բţ֞ɂ֣

    һСȳ²(sh)Dzݵı@fҪ21^ţ֞ɲһ15^ţIJ;ʣµ21-15=6ȥԭеIJ씵(sh)飺

    ԭеIJ·ʣµţ=726=12()

    С(sh)W(xu)ؿ}͡P(gun)£

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