or cnixu THUc
A. x2 -4=A
A. ^s = {-t}
\ro*.*yrN EE KrEM TRA nag ri, r Nanr Hec z0t7 _ zarc
vr6x: roAx a
Thdi gian ldnt bdi 90 pht)t, kh6ng k€ thrlf gian gioo di
I. TRic NGHTEM (3,0 di6m)
Hdy viiit vdo bdi ldnt chi mdt chir cdi A, B, c ttofic D ihhng trudc cau fid tdi dilng.
c6u 1' Trongcacphuongtinhsar:,pi,r*gtinhneohrongducrngvoiph-,ongrinh (x, + r)(x- 2)= ot
Ciu 2. Tfp nghigm cfia phuong tlinh x, + x =Z(x+l) Id:
B. .S -- {o} D. .g = {_t; 2}
B. x2 -2x=0 c. |-r=a D. 6x +12=0
D.3
D. 3x+5 <x+6
C6u 3. Sii nghiQm cria phuqng rrinh 2x1-l_0x
= x_3 Id:
x- -).r
A.0 8.1 c.z
CAU 4. x = 3 ld hghiOm cfiabdtphuong rrinh:
A. l2x> 2- x
1) Giei c6c phuorng trinh sau:
a)2x-6- x, -g; \lax_31* 2=Sx;
4 Giei cdcbdtphucrng trinh sau:
n. jr<-, c. .*].ri
vdfr = 3 thi'
CAu 5. N6uhaitamgi6c 14 rp vit eRS 6 MN _ MP
gs R^S
A. AAO{P - LQSR B. LMN7 - AJieR C. LA4N\_ ASRQ D. t,\,r//., _ "\RSg)
c6u 6' Mot hinh hQp chfr nh{t co ba kfch thu6c ti IQ voi 2 ; 5; 6 va th6 ,i.r, ra 4g0
cm3 .Ba kfch thu6c
cria hinh hQp cht nhAt d6 ld:
A- 2crn;5cm;6cm B.r6cm; 4acm; 4gcm . c. 4crql\cm;rzc,nt D. &,nrr0utr,r2c,nt
Ir. rUruAry (7 tri6m)
Cfru 7 (3,0 tli6m)
.) 5 -2ox _ lo
-'x+3' 9-7-3;
. r )-7y
. a) n-' ;'^ rC;
L+
Ciu 8 (1,0 eli6m)
b) 3x+l<r
/-.t1-"
-\ '1- Z-
MQt xe mriy di tt A d6n B v6i van tdc 4}lan/h Sau khi xe m6y xudt phdt I5 phfrt,
mqt 6 t6 cfrng di r& A d6n B vdi vQn t6c 45kn/h. Tfnh quang ducrng AB, bi6t ring 6 t6
d(in B tru6c xe mdy 15 phirt. *
Ciu 9 (2,5 tli6m) ' n
Chohinhtra:g lvt\rp/ co III\I / /pg;Qfu = fifu. Go.i O lagiaodiern cfia
Mp vit I,{e.
a) Chrmg minh rarg, Attfr\rg _ LNep;
b)Bii5t MN =9cm; PQ=l6cm. Tinh NQ, No,oevitis6diQntrch ctn
LMNevit LNep;
c) Tia phen gsac cta g6c lro\te cet ug t?i A,tia ph6n gi6c cua goc Nep c6t. up t4t B.
Chrmg minh ring: AM.Bp = A/.BN - Ae, .
Cdu 10 (0,5 tli6m)
Tim GTNN cria bitiu thric: 1=lzx-rf +lx-3r*rr-+f +lx_sl.
Gido vi€n "", ii/,, ,'r!,iiorg gia:,i,:iriirn gi thant.
Hp vd t€n lzoc sinh;... ... SBD;