,''
s0 GD&DT HoA eiNH
rY rrU TUYEN SINH vAO LOP 10
TRTIONG T}IPT LAC THIJY
NAMHQC 2ot7 -2018
DE CHIIVH THTIC
on rnr u6N roAN
(DANH CHO THi SINH BAN A)
Ngny thi: 19 thing 07 nim 2017
MA EE 278
Thdi gian ldm bdi: fP phtit, khdng kA thdi giaru pltdt d€
1O€ tni cb OS trang, gdm 25 ciu)
DIEM
SO
PIIACH
@o Chrt fich HAi ddng thi ghi)
GIAM KTIAO
Gi6m kh6o
Gi6m khflo 2
1
Cf,u 1. Rrit go.n bi6u thric
A=i3+J5 -.J3-J5
-"12.
-l
Cda 2. Tinh th6 tich Vr ctia khdi da diQn
sau, bi6t ring c5c g6c & ctinh dAu bing 900
2
Cf,u 5. MQt phAnxu&ng theo k6 hoach phii
may 1000 bQ qudn 6o trong th&i gian quy
dinh. Khi thpc hiQn, m6i ngiy xu#ng may
nhi6u hcrn 10 bQ vd hoan thinh k;5 hopch
tru6c 5 ngdy. Hoi theo kti hopch, m6i ngdy
vne ohii mav bao nhi€u
Cffu 6. Tim
Cf,u 3. Trong mflt ph6ng tqa d0 Oxy, ggi
@) va (I) 16n luqt ld dO thi cria hai hdm sd
13
y:
"22* _ x+ _ vd y = l*1. (D) va {e c*tnhau
tai
MvitN. Tinh diQn tich tam giiic OM^[.
tl
tt
m
de phuong trinh
x'-2x-2m+1=0c6
hai nghiQm xt,xz
Cffu 7. Tinh dipn tfch
S cria hinh thang
trong hinh
tga dQ c6c dinh ld (1; 6),
(7;6), {4;1) vd (2; 1).
vfi
r_l
Cflu 4. Tim tflp nghiQm cria hQ phucrng
trinh sau:
{tt*+zy
=20r7lxtl
l* -2Y = 3xy.
Trang 1/3 -};4:dde*11278
a
thtr 2 chiy trong 4 gio thi rlugc
:
bC
nudc.
J
Hdi n6u vdi thri nhAt ch6y mQt minh thi
thoi eian r ld bao
10u
m6i tIAv bC.
Cflu 8. Rrit ggn bi0u thr?c
B_
d:ffi
voi *1
(1+ r)3 +
(1
- r)'
2-",h-7
Cfru 12. Cho hai sO thpc x, y thda m6n h0
+
th&c 8x2 + y2
"4x
1
) =4. Tinh gi6 tri nho
nh6t g*,, cua Q=xy.
Ciu 9. Tinh this tfch Yz c'ira kh6i t?p
phuong trong hin!, Oiet frinfr c6u n$i ti6p
trong c*a n6 c6 th6 tichld 14 n .
Cf,u 13. Tim gi6 td cta m thi duong thEng
: x * mti€o xric v6i
Cdu 14. Rrit ggn bi0u thric
2y' +9y' +lZy + 4
CAU 10. Tam gi6c ABC co c,iLc trung tuy6n
AAu BBb CCr giaonhau t1i M. Az, Bz, Cz
l6n luqt ld trung di6m cim AM, BM, CM.
gi6c
Tinh diQn
A$zCtAzBrCz theo diQn tich Sr cria tam
tich Sz cta lpc
giSc
ABC.
Cffu 15. Cho tam gi6c ABC vudng tqiA.yE
dulng th5ng d 6i quaA sao cho dkhdng cit
dop BC. Gqi H, K lAn lugt li hinh chi6u
Cf,u 16. Tim sO cflp nghiQm (xy) cria h€
phucrng trinh sau:
:1+
[z^t. -z
*3,[ri
{
Cflu 11. Hai vdi nudc cung chiy vdo m$t
t.l;=
+
"[y
t:s.
cdi bC kh6ng c6 nudc thi trong 5 gi& sC diy
UC. Ni5u voi thri ntrAt cnay trong 3 gi& vi vdi
Trang 2/3
- Ma dC thi278
Cin
li
17. Gqi x1tx2
phucnrg
trinh
2x2
hai nghi$rn ctia
+3x-26=0.
phuong trinh b$c hai nhfln
/
1
!2:
- ----xr+l
L6p
I
y: -j-x, +1
vit
..
Ciu 22. Cho hdm
Tim m
ld nghiQm.
Ciu
Cflu 18. Cho tam gi6c ABC c6 3 g6c nhqn,
vE duOrng cao AD vi BE. Gqi ff h trUc t6m
ciatam
gi6rc ABC.giiit
tanB.tanC:
dE
him
so
m+2
! =-;-=X+mm'+L
2
.
biifn.
s6
23. Cho bii5t tg75a =2*,ll
.
Tinh srn15.
*.*HD
dulng trdn (O) vd gdc nQi
tiiSp IBAC=1300. Tinh do cta g6c
IBOC.
Cdu 24. Cho
Tinh a .
Cffu 19. Cho h0 phuong trinh
t@-1)x-(m-r)v=m-37
lx +2Y =3m +1.
{vor m ln tham si5)
Tim m A6 tq d6 cho c6 nghigm duy
Cffu 20. Tim t$t ch c6c
cha3n+ 5 chiahi5t cho
sO t.u
nhil
nhi6n n sao
n-1.
C&u25. Cho tam giirc MNP vuOng tpi M,
MP :3cm; MN 4cru. Quay tam giic
d6 mQt vdng quanh cqnh i6{ dugc m$t
hinh n6n. Tinh diQn tich xung quanh cua
hinh n6n n6.
:
CAu 21. Rrit ggn bi6u thric
rvF
t'" .fix>0;y<0.
*\ Yo
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-
Ma dA thi278