北理工《信号与系统》习题答案第2章答案(纯手写)

lLrln)*l
xt*)*?23 u.D
k,r*t-^ at+L (aN)
hLt-4nb)
)= qa)(4t*x t&xI
L tt-t1=Gt + z
=) l, 'xt = ({'- e-121 ) u,t*1
btl L ul = + (e-t- u-%) LtLt)
@) | ht ft) = a{m+ cyte
{) a=o
(I C, =l
\ lU Ur= C e-c atrr 7 C,ito;t
,
hnttl:
t
+
O-l) ,at
ht-r{*/-t)+--e "tr;t +e "C.rDt
) i, Lt) = 0o D i,,*t
)l =
dr (-b-A) ryz/L) clx = 1z Lt)x 4, th)
t Crto
-o) (D'-+?/D+zl!/ot=o t flr.o)=1, g'ttro)=z
; ; :t,r,il,Aln= co-m + cro''6 -J
) h,n*)= L'vt-o-'t-tzo
0, kl = d N bt) l,u*) = lw> u u,4,L) = ,f! U
= Lb, ct+t) _ 2 + g *-,., ] *, J -I r/" Lzr) al t -, I-t*r,ol,
-t,-ttt-itUt --;t,e---*rkt) = (+L-t-)tu-'+*wt ) t,LLt)
(l'+ ) ro nt I f w, = o-+ sat
= (nu'trot + br/wr )+st -autrat
04ro lo tr;t + t-h-ps ttu+t + Lb-A) /*:cF,+)
c , t <o
(-e
+
'
o(T't
2 - e-f t- e'/'-t-, lztz-y
t + e a-t - €* - e/-0, uctz f
ea-*_ e*r_L?t+ o{-t, t>f
9r-41 = CrA' f C>O
'A. (.O_l = h,/to_) =_o
\ rt t*S= c,*+ C,tt
+
e-
d-"**r,
ffrrat= lm^ N tu)
U,t*+ >) - uL,L -D
h, w>t rx b*7 = ) f:: e-t^') ol'
= Lo-'-[' , t>v
h, tt+>) - lr, h->) + h, (tt t) - h, tt-l )
( t- e,t )wb * (r- LY-t) utr*g 1 (t- et-t ) u/t-t )
u,th)
- Lt-z) tL uL -z) /+t1>t?o fus=o
>/ll t zf WA
l,r, ,*t + h, wt * h*q x ht &l
WiDt tt{*S+ 9U-t t-*(3Ut)
arl @t
l,tWl
=
=
h, Lts 1 5r4*ts * l.rrl:tl
h,t*t -t h, Lt-t) = e-u^"u,*->)
o-tet - Boaaht
L-'r4f
tB==Y0' =) hL *, = - ft rat
.\ Urw)= te-'-u-tE;t
fi
tn
+
= (Dlr
L'+c+I
p+t ) !p6s =
- c,y)'b ) + e:'
O-b ct-sAt1 ft ct-c.,,t ) - c p
e-t o?
c-a)O -
l!, u cTL) t{. L- z-t tzs o{z
+v+ b -- Q-)t
u47- ^L\)
lt c ->- t+z;
u,Lz. l)
= CtLLt ) t t,u.rt-t) - zul*-z;)x [ 8 o*; - zf *ll -r tut-r;) = lruW t w.t*t)- zu,,t*-2, -buc,t-ts+)u)h->)- 4u*->t )
= _4tCz=3 -) C.=b
,',t'*)= (r+bt )e-* uwc)
:.,/l ( o5+D'-D-l ) Jb)=o ,Jtq=t,J,tttD -1, )tr,rr=-2
z\'(A+ r)- (A1) = o
( A' t) cz\ + t)'= o
Ar:l , Ar=A r=-l
., W*et + cro-b + (cfie-t )"= (c>a
e-t +
>ehrt
-
z a4rt
-t-
t)1,-L
=
L
45,^rt-Ab>n/t,+e-u
='.aA I o,= L Sout 3 w-t) t 9t t-zs I "- hfi) = h*l+ k,t t-t tt k U ->)
z-)
h, cO - lr', Lt -r> l, tt->;
= 8 ut-t1* [L*'r ert ) u*t-z;
': \il1) v tt-Tdz
Y, lrx,4tx x
= T-x, Ltl x N,*t) x 4+ tk ) :c) Xt k) * I ,>'(ht + 't*,+l )
(^ x, Q) {z tb4 c/t +
+ (- e_+'crf+t
*fffi+
h, W) = h,"l wtt h, (*) = 3' wt - 29 h) t elr O
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rr .leibo+ftlwt--o , !{01 =1 !',,,0)=)
r.A+))'=0 Ar =r\2=-) yLt)=c,e-fr+ Crt(_-%
f-u1S"'t=o1g== I
- ) c, (,-u lr=o t cr{* [ ,=o ) qfi e-4't [ ,=,
'e'nl .- + g
-t + at2.-f ,tro fisAt + Bc-et A o-'ro b r b o- tont + v{4@)t - >b9dt + ba,l
ct{tr+sAt
flu*1= a =e
llhc't= -c+ c,+)=o
,;Jtus= -lto-t+ 4rrAt
-jn-t+ /te-t+ /ant)
= Z*2e:1,+O-u+=j-O1-+ro
=
-(- i-,= _ L_L+t) nl-t*
I
u
l, T<o
* 3 ,t^ l
cl+t'
o* l;'
L)=e WL)
(*) - >8 w-,2
Lz)
L
e/ /t t ct tka /wt= J: >o/t* J':'- r rtz
l@= J;, -z dt = z *->)
lIlLlo)= A+Cy=-Q
'7a-)c''= )
=(L-+*Ze--1h + e'w ) U/*2
e4 (L-fi4 )
[,,,1*t- A@zfi+ C>q,^1f
lrr'Lor, = 2c>'-l
-
Je
+u
^+-
I,t)e'(
(
a>x.J
k)>u
olz
+,0
5 /t tt =
DnTtI E;vt-
*{7
et cru*)
+ L-+"-fth-+b-t=+ te-' - { " (/- aht) = (t-t Se + e "Ntt
,t>o
t\u-t) - w Lt -a-Q )
l: 'A)tuT
o<t <
, t.o,
L-lt , -lrt ,0
[kl= l'vwl+ ct( lu)=.
+-lL- z ) t <-l lilt=4-yfr , t2z-zcf-l )-l ltzo
A'b , 6-6t-Ztt-L=> octztp