sO ctao DUC DAoTAo &<br />
<br />
D+r Hoc sud<br />
<br />
Eo ud,t€n tlzt sinh:<br />
DO 0AO d,Ann:<br />
(1 / f t 7 7<br />
<br />
KY rHr TUyEN srr\H sAU D4r Hgc rvAvr 2006<br />
Mon thi: ToAN CAo C,{p ff<br />
(danh cho Cao hoc) Tllbi g'ian ld,rnbd"i: 180 phd,t,<br />
<br />
C5.uI: Giei v), bienluan h€ phuong trinh tr€n trulng s6 thuc:<br />
)rt+ 14 -1, rr*Arr+ rz*' 14 -1, rt* rz*,\rs* 14 :1, rz* rs* frt* rz* rs*\ra -1.<br />
<br />
CAu II:<br />
Trong khong gian vcrihe toa do Oryz, cho didm A(I,2, -2) vb,dudng th8,ng A c5 phucrng trinh -0, ( r*z-3<br />
<br />
t -r*2y-z*I<br />
<br />
-0.<br />
<br />
a. Vi6t phuong trinh mit phX,ng(P) di qua ,4 vA,vu6ng g6c v6i A. b. Tim toa do didm B d,6ixirng v6i didm A qua A. CAu III: Tinh tich phAn:<br />
<br />
J]<br />
D<br />
<br />
ff<br />
<br />
drcly<br />
<br />
trongd,6D - {(r,y) l r' + A' < 2 y , a S rj. C6.u IV:<br />
X6c dinh bd,nkinh vh mibn h6i tu crla chu6i tuy thtra sau:<br />
oor<br />
<br />
7rn"<br />
CAU V: GiAi phucrngtrinh vi phAn sau:<br />
<br />
f +@-3)"<br />
<br />
y" - 3a' + 2a - e2"12r f cosr - Ssinr).<br />
<br />
Ghi chri: C6n b6 coi thi khong giAi thich gi th€m.<br />
<br />
vA eQcno DUC DAorAo<br />
DAI }IOC HUE<br />
.f<br />
<br />
Hg ud,t€n th{ s'inh: d,anh: Sd b6,o<br />
,'| \l*r-a<br />
<br />
2007 KY rgr rurrdl\T srNH sAU DAI IrQC N..[.wt M6n thi: Todn cao cdp II (dd,nhcho Cao hgc) 1-80Phf-t Thdi gr,anld,mbd'r': CAu f. a, Tlm hqng crla ma trQn sau:<br />
-\ ) (<br />
t\\rt'-'<br />
<br />
b. Giai hQphucrngtrinh sau tr6n lR: (<br />
<br />
A- l3 \a<br />
<br />
/t<br />
<br />
-4<br />
<br />
- 2 4 \I. -6 tz I<br />
ns -l<br />
<br />
8<br />
<br />
"'* * 4rt 3*r z6n2- lns _ , { _, [ 6"t * 9r2 4ns<br />
<br />
CAu II. Tlong kh6nggranv6i h€ to+ d0 truc chirdn,chohai m{t ph!o* (P) vd (P') c6 phuongkinh<br />
lbn luot lb,: 2n-U*22 *1:0n+A* z - L -0; tr6nII6y tfnh khoAngc6ch tt g6c O d6n giao tuy6n (d) crla hai mdt phH,ng<br />
<br />
CAU III. a. Tlm mibn h6i trf cria chu6i lui thta<br />
<br />
,,:l \3n*2/<br />
b. GiAi phucrngtrinh vi ph6,ncdp hai<br />
<br />
if#)"("-2)*.<br />
Y" -5Y' : -1nz *2r'<br />
<br />
C6.u fV. a, Dune vi ph6n cdp 1 ad tinn gh,ndring bidu thric (1,002)40. b. Tinh tich ph6,nbdt dinh<br />
<br />
Cd.u V. 0,. Cho p : IR -+ IR th hb,ms6 khd,vi. Chring m-inhrXng hh,ms6 z:yg@, _yr) , thod,md,nphuong trinh z ! 0z L 0z<br />
<br />
;a.- aav:F'<br />
b' TfnhtfchPh6'n<br />
trong d.6D th,mibn gi6i han bdi dubng trbn 12 + y2 : Zan, a ) 0. Ghi chri: Cd,nb6 coi,thi khdnggi'di,thdch gi'th4m.<br />
<br />
f t @d'ad'v' J Jo<br />
<br />
e6 ctao DUCVA DAOTAO<br />
D4r HOC HUE<br />
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<br />
Ho ud,t€n th( s'inh: Sd bdo danh:<br />
<br />
KV THI TUYEN SrNH SAU DAr HgC NAM 2oo8 M6n thi: TOAN CAo cAP rr<br />
(dd,nhcho Cao hpr) Thdx g'ian |d,mbd"i:180 phrit<br />
<br />
CAU I. GiAi vh bien IuAn he phucrng trinh sau theo a trong trudng s6 thuc IR: -3"r+ 12- rs* 14 -1<br />
<br />
It<br />
<br />
)<br />
<br />
rt*2rr+4rs*4rq -3rt*3r213 rt]-5*r+3rs*3ra<br />
<br />
-2 -3 - a.<br />
<br />
CAU II. Tlong kh6ng gian Oxyz cho m5t ph8ng (P) di qua 3 alidm A ( r , 3 , 2 ) , B ( 1 . , 21 ) , C ( 1 ,1 ,3 ) . , Vi6t phuong trinh tham s6 cria dudng thd,ng(d) cli qua trong tA,mcrla tam gi6c ABC vd,vu6ng g6c vdi mbt ph8ng chrla tam giiic d6. CAU III. a. Tinh gi6i han:<br />
r---+*oo<br />
<br />
lim<br />
<br />
r+'/F+7<br />
1+ lnr<br />
, . d'r' r"-r<br />
11<br />
<br />
b. Tinh tfch phAn suy r6ng:<br />
<br />
1".<br />
b. Tinh tich phAn<br />
<br />
CAU IV. a. Cho p : IR --+ IR lh, hb,m sd khA vi. Chringminh rHnghdm sd z - g(r' + a') thda man phuong trinh:<br />
<br />
0z 0z - U ' a ^ - r ^ oa or<br />
<br />
J Jn' trong d6 D lb miEn gi6i han b&i dubng trbn 12 + a2 : 2ar , a ) 0 .<br />
Cdu V. a. Chirng minh chu6i<br />
oo1<br />
<br />
fr I - | I @'+y21aray,<br />
<br />
+ 2 Q" - 2)(3n 1)<br />
?2:l'<br />
<br />
\-'<br />
<br />
hoi tu vb tfnh tdng crla n6. b. GiAi phucrng trinh vi phAn cdp mdt: d,r A2 * (2ry + 3)d"y : 0.<br />
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IO ct,q.oD.UC DAo TAo VA<br />
DAI FICC 1_IU6<br />
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IJp ud,t€,nth'[ stnh: ,56 bd,o danh:<br />
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r{V r.'F{r rurrfiN srNH sAU D4r Hgc xAvt 200e(Dot r)<br />
NI6n th'i: TOAN CAO CAP rf (dd,nh cho Cao lrp") Tlldi g'ia'nla'm bd,'i:180 phdt C.ir.r -1.<br />
(,ito<br />
r 1 1<br />
<br />
urzL tr'6,n<br />
<br />
rvr:( -i<br />
\-z<br />
t.<br />
I l t r ! rrril trin nghicli c1tlocira, NI . :) Cliai h0 nh.ytrl,?'tr')"n11 tro n o' f rr sar,u<br />
-Lv ,.-o wr j<br />
<br />
-1 1 0<br />
o' S O<br />
<br />
-t \<br />
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-r/<br />
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u \i .<br />
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Tfr\<br />
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rirn<br />
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thuc R: z z -B<br />
11<br />
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( lt*<br />
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.Y'-<br />
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'u-<br />
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-2r* { I -r.<br />
/-r;i.,-. Vr-r.il TT' -J-.<br />
<br />
a<br />
<br />
-96.<br />
<br />
i'r'ong kh6ng gian vcvihO toa d6 truc chudn, cho dulng th8,ng (d) c6 phucrng trinh<br />
l,]L:, n sd<br />
<br />
r :!+<br />
r?-r ^ 'r<br />
<br />
I,'!J :!<br />
<br />
-2A, z -!-l<br />
<br />
).<br />
<br />
i1[y tinh k]roiing c6c]r bri didm A(2,L,2) d6n du]ng th8,ng(d).<br />
(Jet'-1 * i,'-.<br />
rr-<br />
<br />
t. Dir-rrg r-ririncdp 1 dd tfnh ghn dfng bidu thric vi<br />
soG nrw-2. v-1 ,uur<br />
<br />
l'inli cliGntich hlnh ph8ng gi6i hq,n b