Ordinary Differential Equations Exam

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Laplace Transform

Transcript of Ordinary Differential Equations Exam

  • I,IA?H 2S6Exarn IIIDr. lvloha.mrnad I(havaniuSHOlry YOUR IMOIdK

    (Prs)

    (10) 1. Find r[/(r)1, rvhere i(r) = {1,' ?:i."'{ 1t) = t U(t- -) = tn 7(t) , n; tt

    Yo{+ 3t'1. f ,)" G,nrr) = (- ,), q,n Gr= f\"+t)t

    (10) 2. I)etermine Llt' - fer + e4t cootl.

    NAI,IE ,K!t.,nttlo * '- "ru *r *: ..

    ql+\=t1(t-z) / ', G(s)= {'': (- rr J'n f a t\ [ t-,' ^-',1- r'' .r.,F)=(-') i*;t- i

    .L-1)

    I

    sb\)

    >,1

    /-'IroL

    s- !---[s-,,)t t I

    (10) g. Detelnrine f-' I u ltr* | .=lLs'+4s+13J(StS= sL+ks+rr -) st+ks+t3: (s*.f tq

    t-'f 3srs l= t^'L' L *-t*'l I o(J 3s+ 6 L-LQtr) tq(s+r)z tt:I F)t (+)StZ

    I ss*-s IL (stz)"+q J--1

    I2l l_. ? 2. I\s+z\ f3 \_l(si-|'*r'

    \t3-t.*, {*rt} =

  • (ro) 4,Firrri /t'l#A]

    (1u) o.[=o]

    p,s'+ trA 1- rls'+ css(s'rt)

    A + Bs*C Is s."t lt-'l'lA Ipl

    L

    C= o, 6=-*-t'E l-)4'/r - (v,). Is F;.]-,/-l*;. /;'iLg/1!r.l= _L-\, S \l:\*,rutlirrl= +.j --s1* ,t ,/\-b-- c

    **, ( t'* ,l(:'+r) -(10) s '-' ['. (H)] [k,.d\ l{t +rt)i= F'i r) = -+f,"= i- "fr 'L'lt'{t+ro}]='{*.#i

    -> t {f0 = *z- sss[rt) a- 'i-r's (t)

    *) Zi+tt-oo5t"'! =[*\ r(")a"Js

    *c,cr[A -l F(*)= *

    nr;rt = tilIJ = -rfnt,7L

    ,\ .b1 + ,1(-, t\i

    L t t-t"'-rJ

    f i, -g*rd,I \o ,t^L+r \,/s- J1y= ..'+ t

    4u "- L" da

    1.N **=E

    r\\ .

    t*r,a- + t

    Ot t {(r)J =i+ "[(r) = r

    "url"l : ul ,;r,laL-t-l- L"J t/,V nle/\n l@-) j, U *"Jr$"bl,^\ - +t

    I

    S,ffi-!,n*rplfrl +r) re- ,e" [t)

  • {2A} 7. Solre t1' the method of Laplace T\'anslbru the iuitia} r,alue probler rr;,1" 4-Ztyt - ,ly:1y(o) : tl; y'{tl) = o.

    &1r"\ -z {ris'Y(i -sylo)- v,lo) t"\ v\'- {r,)

    , ,lty'j ,, /r\v] , t"\t]

    ^-r,L .

    LtPt*a,E Dop.,inr

    It* y'l = Gr)"+o)= *(civ')) = -*(,vr,l-rr,,: -Yl'l-'Yh)

    e st [,) ,A W *.(-, y,(,) -y,r) - { /r,r =

    (i) + yr(s) =o3t^('\ - s7v\-_a -J+c

    \s

    21s) =

    ("*) r' +c

    \5

    LI-t*

    7z -s/ue-lL,I t -5/EI se

    I

    - z rlr(s) =[s"-i yn>(+ .*)Y

    y(,\. uJt+- i)d' _YG) = J ,nt ?() d,

    L-S stn

    -))\

    g s'1,se

    Lt -s /,,:5eal

    -s /q,l-se ds +c-;

    Itn ordut (sot'ilir'og)orTe

    -JZs' ,1trs\

    j,/ (tZt

    -5 /yoL C

    &*\

    \ - 5ltlSE

    wlr.t f[..coru,yn I

    4s- -/

    zts /q

    = 4 +ce-s, -F,. -s"/qs'e

    Y (t) (sor",rncd ilr LNtaLft o"^*,;rr)

    C v-rrsf \",

    +4*! -t-t^t ont rr*ws'.

    !/r1 =6 , ,.!n90r9@

    zt:

    J.5i

    s' J z

    I .7,)',lL+qe* ) +\r3 -sl Ito

    ob