Diferansiyel Denklemler - Doç.dr. Tahsin Engin Ders Notları

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    JhfeaosdfroeA@F^IEW_FDAFEMDFJDF^

    Ab.Ar.QihsoeFeloe

    Fydd>338

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    >.1DEFF^BDJI_IEN^EG JF^QFNFAFEA@F^IEW_FDAFEMDFJDF >.1.9.AfomfedfroefIyrdinodorQoptfNoroegoJfrtfnfafeAfemdfjdfr>.1.>.HbjbkfeQoptfNoroegoJfrtfnfafeAfemdfjdfr>.1.7.QijAo`friesoyfdAfemdfjdfr

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    9. NDJ

    N^EG JF^QFNFAFEA@F^IEW_FDAFEMDFJDF^

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    Ao`friesoyfd afemdfjdfr uzue yddirar, aeyiai bu `ozomsfd nodojdfr vf jhfeaosdom

    aiddireai efjdo nor yfr tutjimtiar. Nodoj iaijdir vf jhfeaosdfr lfefddomdf afoojf

    uriyie sostfjdfro oegfdfrdfr vf ao`friesoyfd afemdfjdfr jhfeaosdfrf nor sostfjafmoieihtir afomfedfroe afoojoeo oegfdfjf vf `ozomsfd bdiy aihi oyo iediji bdiei lftoror.

    Nodoj vf jitfjitom rfegodfroef yefdom jitfjitom rftojo uzue srfaor nodoj vf

    jhfeaosdom `imdtfdfro iriseai nor iedijizdm mbeusu bdjutur. Nodoj vf jhfeaosdom

    `imdtfdfro rfegodfroe tfbrom jitfjitomdf iridiree bm ai oyo bdjia mbeusueaihfj`omordfraor. [ori nu tirz rftoj rfegodfroe prbndfj zjf nfgfrodfroeo

    lfdotorfnodjfdfroef yirajg bdijijimtiar. Nu uyludiji bu eovfrsotfaf nu afrstfe

    niirszdm briee % 63dfrf miair mirjtr. Nu osf abi nodojdfro vf jhfeaosdomndjdfroooeefjdonormiyptr.Nutirtjivfiedijizdmlfefddomdfjitfjitomrfeojo

    lrfe rfegodfrdf abi nodojdfro vf jhfeaosdom rfeojo lrfe rfegodfrf `irmd ofromdo

    afrsdfroe bdujisydi sbeudiejtr. Nydfgf abi nodojdfro vf jhfeaosdom `imdtfdfrorfegodfroef mfeao aosopdoedfro ofrosoeaf mirditmdir prbndfjdfro zfnodjfdfro ooe

    jitfjitomafrsdfroeomfeaodfrovfrjfybdueunfeojsfjodfraor.

    Ao`friesoyfd afemdfjdfro gfnorsfd afemdfjdfrafe iyrie fe efjdo zfddom `bemsoybe

    trfvdfro ofrjfdfroaor. Ao`friesoyfd afemdfjdfroe oegfdfejfso oyo nor jitfjitom idtyipslfrfmtoror vf abdiysydi rfegodfroe nu afrsf nidijiaie egf nijd vf nijsz

    afomfe,srfmdovfsrfmsoz`bemsoybe,iaovfmsjotrfvdfr,`irmdirvfirtrjdirodfoetflrid

    lonotfjfdmbeudirlzafelforjfdfromfsoedomdfefrodor.

    9.>.NI[OQFJFDQIEOJDIJIDI

    Nor yi ai aihi `izdi `bemsoybeue trfvdfroeo ofrfe afemdfjdfrf ao`friesoyfd afemdfjaoybruz.Aofrnoro`iafydfao`friesoyfdafemdfjnortimj`bemsoybedirodfnuediretrfvdfroiriseaimoodomoyotfjsodfafr.Numivrijodmbdirim90

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    faodjfmtfaor.Abdiysydiao`friesoyfdafemdfjoefdaffaodjfsoprbndfjhimmeaiyftfrdonodlosihono bdjiy, prbndfjf aihod bdie afomfedfronfdordfyfnodjfyo,uylue nisotdftorjfdfr vf

    virsiyjdiryipinodjfyo,muddiedigim`ozomsfdprfesopvfmieuedirnodjfyovfafaommitdonor

    ieidozyipinodjfyolfrfmtoror.Iiainizrefmdfrvfrodjotor.

    refm99Efwtbeuehirfmftyisis

    Efwtbeue omoego mieueueu muddieirim az nor ozlo nbyuegi @ muvvftoeoe ftmoso idteai

    hirfmft fafej mtdfdo nor gosjoe mbeujueu s tiejdiyie ao`friesoyfd afemdfjo fdaf

    faoeoz.

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    bdirim vfrodaooeo nodoybruz. Efwtbeue omoego mieueuMuvvft:Mtdf vjf fmdoeaf o`iaffaodaooeafe

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    yizdinodor.Azfedfjfyipdrsi

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    : ao`friesoyfdafemdfjofdaffaodor.

    refm9>EfwtbeuesbujimieueuNidielti nfdordo sgimdisihopmrfsfd jftidnor gosoj sgimdQ3 bdie sgim su ofrosoef

    nrimdybr. Gosjoe nidiel sgimd su sgimdeaie am osf, gosjf s tries`fronidiyigi nodoejfmtfaor. Nuei lrf gosjoe hfrhielo nor t ieeai sgimde Q(t) vfrfe

    ao`friesoyfdafemdfjonfdordfyoeoz.

    zjWuyue nudueauu min jmfjjfd fmodaf yidtdj aefdoj (fvrfyf s miyn ybm) vf

    nueilrffefrkoeoembrueujuprfesonoeouyludiyidj.Gosojsgimsuyinrimdamtietsrfsberigosjoefefrkosoeafmo irt,gosjoe yzfyoeafegosjftiejdi(mbevfmsoybe)lffe s

    fefrkosomiairbdigimtr.Nueilrf

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    ao`friesoyfdafemdfjofdaffaodor.Nuafemdfjmrfsfdgosjoesgimdezijiee`bemsoybeu

    bdirim o`iaf ftjfmtfaor. Ao`friesoyfd afemdfjdfr `ozomsfd bdiy, nijsz afomfe(dfr)oe

    nfdordo nor iridmtimo affrdfro ooe tiejdiyinodor. refoe nu afemdfj mrfsfd gosjoe

    jfrmfzoeafe yzfyoef miair bdie sgimdm afoojoeo tiejdir, nu serdire aeai

    lffrsozaor. Iyrgi afemdfj, gosjoe sgim suyi aidarda ieaie otonirfe (t:3) sgimde

    vfrorvfabdiysydifdaffaodfgfmzj3tirideailffrdobdigimtr.

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    Nor yi ai aihi `izdi nijd afomfeoe tfm nor afomfef lrf iao trfvdfroeo ofrfeao`friesoyfd afemdfjdfrfIaoAo`friesoyfdAfemdfj (IAA) afeor. Nueue yieeai ofrosoeaf

    noryiaiaihi`izdinijdafomfeoe,noryiaiaihibmnijszafomfeflrftrfvdfro

    nudueie afemdfjf osfMsjoAo`friesoyfdAfemdfj (MAA) aoyfgfoz. Nu afrstfIAA mbeusu

    zfroeaf aurudigimbdupMAAmbeusuaihi bm dosiesstazfydfraffdf idejimtiar. Iao

    norao`friesoyfdafemdfjfrefmbdirimGbtx>xfy1yx7y x> +:+

    vfrodfnodor.

    Nor ao`friesoyfd afemdfjaf fe ymsfm jfrtfnfdo trfvoe jfrtfnfso ao`friesoyfd afemdfjoe

    jfrtfnfsoeo vfror. refoe sttfmo afemdfj 7. jfrtfnfafeaor afeor. Nueue yieeai,

    jfrtfnfydfsmimirtrdienormivrijbdieafrfgfyfafafoejfmlfrfmor.Norao`friesoyfd

    afemdfjafnudueiefeymsfmjfrtfnfdotrfvoessef,nuao`friesoyfdafemdfjoeafrfgfsoafefgfmtor.

    Nor ao`friesoyfd afemdfjafmo nijd afomfe vf tj trfvdfro noroego afrfgfafe osf,

    ao`friesoyfd afemdfjf doeffr ao`friesoyfd afemdfj afeor. Abdiysydi ofrosoeafy>7 f,ysoe,yy,yy,)y(,y lono tfrojdfr nudueie afemdfjdfr doeffr afodaor. Nueue

    yieeaiafemdfj xde,f,xsoe,yx,x7

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    `brjueai o`iaf faodfnodoybrsi afemdfjf doeffraor aoyfgfoz, imso hidaf doeffr bdjiyie nor

    ao`friesoyfd afemdfj sz mbeusuaur. Nu afemdfjaf ffr 3)x(^ : osf doeffr ao`friesoyfdafemdfjhbjbkfeaor.Imsoaurujaiafemdfjhbjbkfebdjiyieao`friesoyfdafemdfjiaeidr.

    refm97Ao`friesoyfdafemdfjdfroese`dieardjisIiaimoao`friesoyfdafemdfjdfrose`diearez.

    zj(9) 3y7y :+ (>.jfrtfnfdoeffrhbjbkfe)

    (>) xsoex>y7y +:+ (>.jfrtfnfdoeffrhbjbkfeafod)

    (7) 3yy7y :+ (>.jfrtfnfdoeffrafod)

    (1) x>fygbsyxsoey :++ (7.jfrtfnfdoeffrafodhbjbkfeafod)

    Ao`friesoyfd afemdfjdfr nijd afomfe vf trfvdfroeoe mitsiydiree aurujuei lrf af

    se`dieardjimtiar. Ffr nu mitsiydir norfr sinotsf afemdfj sinot mitsiyd ao`friesoyfdafemdfj, ffr nijsz afomfef nid `bemsoybedir osf afomfe mitsiyd ao`friesoyfd

    afemdfj iae idr. refoe xsoey>y :+ afemdfjo sinot mitsiyd, xzxzxgbsh > :+ osfafomfemitsiydnorao`friesoyfdafemdfjaor.

    9.7.A@F^IEW_FDAFEMDFJDF E[JDF

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    Nor prbndfj ooe ao`friesoyfd afemdfjoe fdaf faodjfso lfefddomdf mbdiyar. Aofr yieaie nuafemdfjoezjeenuduejis osf lfefddomdfzbraur.Nor ao`friesoyfd afemdfjoezj

    nizfe nor yi ai normi af`i oetflrid idji odfjoeafe onirft bdinodsf af nu tr aurujdir

    lfefddomdf ostoseiar. Qj ao`friesoyfd afemdfj topdfroef uyludieinodfe lfefd nor zj

    yetfjo ef yizm mo jfvgut afodaor. fotdo se`diri iyrdie ao`friesoyfd afemdfjdfr ooe

    nuedirizlzjjftbtdir

    lfdotorodjotor.Nizfenorao`friesoyfdafemdfjozjfmnorafe`izditfmeooenfrinfrmuddiedjiseeyie srinutfmeomdfrafmoyftfrdonoruzjiedmazfyo

    vf hefr lfrfmtoror. Niz ao`friesoyfd afemdfjdfr siafgf ustigi yipdj nor timj

    jieopdisybedirdi zdfnodormfenizdireeieidotomzjdfroojmieszbdinodor.Abdiysydi

    norao`friesoyfdafemdfjozjfmnodojafezoyiafnorsieitaidlonoaor.

    Gfnorsfd afemdfjdfroe zjeaf lfefddomdf 393x : treafe nor afemdfjosidiyie iyrm affrdfroe (mmdfroe) nuduejis hfaf`dfeor. tf yieaie nor ao`friesoyfd

    afemdfjo zfrmfe, nfdordo nor iridmti afemdfjo sidiyie `bemsoybedir irier. _umiraimo

    gfnorsfd afemdfjo sidiyie affrdfr > vf 6 tor. Bysi 3yy : ao`friesoyfd afemdfjoeoe nor zjbdauueulstfroeoz.

    zjPfrodfezjao`friesoyfdafemdfjosidijidar.

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    fyideirim ao`friesoyfd afemdfjaf yizdrsi 3f>f> x>x> : bdur vf afemdfj

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    x9y : o`iafsoeoe 3xyy :+ ao`friesoyfd afemdfjoeoe nor zj bdauueulstfroeoz.Pfrodfezjehfrxaffroooelffrdobdupbdjiaeorafdfyoeoz.

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    fdaf faodor,

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    faodor.

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    refm90Norao`friesoyfdafemdfjoelfefdzj

    7x>Gxfy x> +: o`iafsoeoe >3x8y1y1y :+ ao`friesoyfdafemdfjoeoe,Gsinotoeoehfrhielonoraffroooe,zjbdauueulstfroeoz.

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    :+ y1y1y + )Gxf1Gf1( x>x> )>Gxf>Gf(1 x>x> ++ >3x8)7x>Gxf(1 x> :++fdaffaodor. Abdiysydivfrodfezjlfefdzjar.

    ojaotfmrirnorsunieybsueiaidardiemrfsfdgosojrefojozfaefdoj(refm9>).Fdaf

    faodfeao`friesoyfdafemdfjoezjeafegosjoesgimdeezijiediafoojo,

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    bdirim fdaf faodor. Nu o`iafafG nor mfy`o sinottor. Mbdiydmdi lstfrodfnodor mo nu zjGeoeida affrafe nijsz bdirim ao`friesoyfd afemdfjo sidir. Abdiysydi Geoe idinodfgfo

    sbesuz siyai affrf mirdm sbesuz siyai zfd zj fdaf ftjf ojmie virar. Lfefd

    zj ofrosoeaf gosjoe nidiel sgimd (t:3 ieeai) bdieQo nuduejiaeaie nu sbeu

    srproz afodaor. Abdiysydi nidiel sgimd nfdortodaooeaf, vfrodfe ao`friesoyfd afemdfjfbdie zj af zfd nor zj mojdoo mizier. Nozoj odlodfeaoojoz zj af,Q fmsfeoeoQo

    sgimdeai mfsfe zfd zj bdigimtr. Nuriaie u efjdo sbeu mjimtiar; Nfdordo nor

    prbndfjoe tfm nor zj bdsi ai, nu prbndfjo tfjsod fafe ao`friesoyfd afemdfjdfroe

    sbesuz siyai zjf sihop bdjidir jjmear. Nueue efafeo, ao`friesoyfd afemdfjoe,nijd afomfedfrdf nijsz afomfedfrafmo afoojdfr iriseaimo nor odomo bdjiseaie

    nimi nor fy bdjijisar. Ao`friesoyfd afemdfj, nor `bemsoybe vfyi trfvdfroeoe nfdordo

    nijsz afomfe affrdfroef mirdm lfdfe nijsz afomfe affrdfro mbeusueai nodloofrjfz. Wbeu bdirim iye `ozomsfd bdiydi odlodo pfm bm `irmd prbndfj iye ao`friesoyfd

    afemdfjdf o`iaf faodor. @irmddm osf fdaf faodfe lfefd zjafe nozoj odlodfeaoojoz

    prbndfjoe zfd zjef lffnodjfjozo sidiyie zfd irtdire tiejdiejisar. Ffr nu

    irtdir nijsz afomfeoe iye affro ooe vfrodjosf nu irtdiri nidiel irtdir,nijszafomfeoenorafe`izdiaffroooenfdordfejosfnuirtdiriserirtdiraoyfgfoz.

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    aztP yizdinodor. Nor aofr irt osf gosjoe nidielti h ymsfmdooeaf

    nuduejisirtar.Aofrnoro`iafydf,

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    Hfromoirtainijszafomfeoe(t)iyeaffroeafvfrodaooooenuprbndfjnornidielaffrprbndfjobdjimtiar.

    Norao`friesoyfdafemdfjozjfaf,afemdfjosidiyiey:y(x)`bemsoybeueuenuduejisirzu

    faodor. Iegim bu zijie nu jjme bdjiz vf yimdim zj tfmeomdfro zj ooe tfm

    idtfreito`midr.Wiysidyetfjdfrnuefafedfbrtiyimj yimdimzjybddirar.Mipid

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    yetfjdfr,iegimnijszafomfeoeaihiegfafetiejdiej affrdfroefmirdmlfdfe

    nijdafomfeaffrdfroeoyimdimbdirimvfrjfmtfaor.

    9.1.A@F^IEW_FDAFEMDFJDF EAB^VAIEEQFL^ID_BDV_DI[JDF

    Niz ao`friesoyfd afemdfjdfr doeffraor vf trfvdfro ofrfe tfm nor tfrojf sihop bdup,

    nodoejfyfe(irieie)`bemsoybeuenorirpiebdauutfrojdfroofrjfzdfr.Ffroetflridodfjo

    yipdinodoybrsi, ao`friesoyfd afemdfj af abruaie oetflriddfjf tfmeooydf zdfnodor

    afjfmtor. Nueue yie

    eai aofr niz

    ao`friesoyfd afemdfj trdfro doeffr bdjiyie tfrojdfrfsihoptorvfnuybddizdjfdfrojjmeafodaor.

    : 3fxy x0> abruaieoetflridybduydizdfnodor.

    :+ 3fxxy7y x0> abruaie oetflrid ybduydi zdfjfz, em nodoejfyfe`bemsoybeuenorirpieaurujueaiebdauu7xytfrojoabruaieoetflriddfefjfz.

    Norao`friesoyfdafemdfjabruaie oetflridybduydizdrmfetfrojtfroj oetflrffaodorvf

    noroetflridsinotofmdfeor.Hfroetflrisybeiajeaitrfvdfroejfrtfnfdfronorardrvfnuei mirdm nor nimi oetflrid sinoto fmdfeor. Abdiysydi nor ao`friesoyfd afemdfjoe lfefd

    zjeaf,ao`friesoyfdafemdfjafnudueiefeymsfmjfrtfnfdotrfvoejfrtfnfsomiair

    mfy`osinotfdaffaodor.

    refm98AbruaieoetflrisybeodfzjIiaimoao`friesoyfdafemdfjdfroeabruaie oetflridybduydizdpzdfjfyfgfmdfroeo

    nfdortoeozvfzdfnodorbdiedirzez.

    (9) 37y6y :+

    (>) 3x0y > :

    (7) 31yy> :

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    zj(9)

    Nu afemdfj, omoego tfrojoeoe nodoejfyfe `bemsoybeu (yieo nijd afomfeo)

    ofrjfsoeafeabdiyzdfjfz.

    (>)

    Nu afemdfj doeffraor vf trfvdo tfm tfrojo nuduejimti vf aofr tfrojdfraf

    nodoejfyfe `bemsoybe y nor irpie vfyi `imtr aurujueai afodaor. Nu efafedf afemdfj

    zdfnodor.Afemdfj>.jfrtfnfafebdauueaieirtirai>mfzoetflridid

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    phfrsf`froeafnorsinotoefmdfejfsolfrfmor.

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    3at

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    >. NDJ

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    20/90

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    refm>>8

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    www.ffjafrsebtdiro.gbj

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    (l)

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    xy

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    6.9.Qijao`friesoyfdefafjfmtor. xyxyyxu : >>),( `bemsoybeueuetijao`friesoyfdoeoidez.

    6.>.Iiaimoao`friesoyfdafemdfjdfroetijao`friesoyfdbdupbdjiamdireoegfdfyoeoz.Qijao`friesoyfdbdiedirzez.

    (i) ( ) ( ) 39797 :++ yyx (n) ( ) ( ) 39797 :+ yxy

    (g) ) ) 3>>> :+ yfxyxy y (a) 3>> : yxyy(f) ( ) 3gbs>soe :+ yxfxf yy (`) ( ) ( ) 3>)> :+++ yyxyx

    (l) ( ) ( ) 3gbssoe >> :+ yyyxx (h)9

    9

    ++

    :yx

    yxy (o)

    9

    >> +

    :

    y

    y

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    xfy

    (m)y

    x

    fyx

    xfyxy>> >gbs

    >soe>

    +: (d) ( ) ( ) 3>> :++ yyxyx

    (j) ( ) ( ) 31>> >> :++++ +++ ayfxaxxxffx yxyxyx

    6.7.Iiaimozjdfrfsihopbdieao`friesoyfdafemdfjdfrofdaffaoeoz.

    (i) 9.>soe),( > :: +yxfyyxyx` (n) 16tie7),( 7 :+: yxyxyx`

    6.1.Iiaimonidielaffrprbndfjdfroeoezez

    (i) ( ) ( ) 9)3(,39>19> 7> ::++ yyyyx

    (n) ( ) ( ) >)9(,39gbssoe7 >7>

    ::+++ yyyyxxfyx x

    (g) ( ) ( ) 3)3(,37>797> ::+++ yyyxyx

    (a) ( ) ( ) 3)>/(,3gbssoe7 7> ::+++ yyyfxyfyx xx

    (f) 1)3(,9

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    >

    :

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    : yyx

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    0. IiaimoNfrebuddotopoao`friesoyfdafemdfjdfrozez.

    (i) 3)9(,1 :: yyyy (n) 9)3(,1> 7 ::+ yyyy (g) 3)9(,> :: yyx

    yy

    (a) xyyyx de>:+

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    7. NDJ

    MEG PFAIHI_MWFMJF^QFNFAFEDEFF^A@F^IEW_FDAFEMDFJDF^

    7.9L^

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    jfrtfnfdo afemdfjdfr ooe iye fyo sydfyfjfyoz. em nu afemdfjdfroe zj, nym

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    afemdfjdfroydf mirdidr. Nu efafedf nu tr afemdfjdfroe zj ybddire oyo mivrijimlfrfmor.

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    )()()( x^yxYyxSy :++

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    71y xy

    x : hidoeaf yizdjiami stieairt `brji lfdjo

    siydjiz.

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    refm79

    Iiaimoao`friesoyfdafemdfjoetfmnorzjeebdauueuvfnuzjezjiridelstfroeoz.

    76 gbs >

    9

    xy y y x

    x

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    9

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    zjnuduejiyinodor.

    refm7>

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    zjevfiiaimoaurujdirooezfdafemdfjdfroeofdaffaoeoz.

    i) y(3):93, (3) 6y :

    n) y(3):93,y(D):3

    g) (3) 6y : , ( ) 93y D :

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    a) (3) 6y : , ( ) 6y D :

    zj;zjiridjz Dx3 bdigimtr.Irtiraiomomfzoetflrffafrsfmlfefdzj=

    >9 gxgy +: bdur.Nuosffojog9bdienorabruafemdfjoaor.

    i. y(3):6 }g9:6y(3):93 }93:6.3+g> ,g>:93

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    xy

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    g. Pfrodfembuddirooey(3):6 }g9:6y(D):93}g9:93

    nudueurmonuojmieszar.Abdiysydivfrodfembuddirooeprbndfjoezjybmtur.

    @ozomsfd bdirim prbndfj auvire hfr omo yieeaie s vfrodjfsoeo vf mirird rfkoj

    bdujiseelrjfmtfaormonuojmieszar.

    a. Pfrodfembuddirooey(3):6 }g9:6y(D):6}g9:6

    abdiysydi >6)( gxxy +: fdaf faodor mo nu zj g> yf nid bdauueaie tfmzj afodaor. @ozomsfd bdirim nu prbndfjoe auvire nor tiri`eaie vfrodfe see

    aofr tiri`eaie iye hzdi uzimditrda nor auruji mirdm lfdor. Nu osf auvirofrosoeafmosgimdmaidjenudjiooeyftfrdonornodloafodaor.