rNH rHAt NGUYEN
so Gr{_pUC & pAo
---i- Hec srNr{ cr6l cAp rinrg r,6p ro
rAo rir rnr cHeN
NAn"{ Hec zg1s _zo-G
tr*#,fr?ffii?:
UBND
un
*rixnrmrc
rhdi sian:
Bni 1 6
aie4
a) Gi6i phuong trinh:
- zx)Jx -t - 2(*, +
f *'*4y-y3 +l6x
z(s*'
b) Giei he phucmg trinh:
BAi 2
*f{{*$tr:;r'i'rff;f*n
siao di)
g
+ z) +
3(*,
I
7
x).(1) .
-.
L,*r'-s(l **')
aieml
Hdy tim tdt cec6c nghidm nguy6n ducnrg
(*;y)
cria phucmg trinh:
1111
;-r- 3*i'
l-r
Bni 3 1+ arcm1
Trong m{t pherrg tga dQ Oxy, cho hinh binh henh ABCD c6 A(-5;2).
;.'
,.
i
u1-t;-21 ld di6m nim b6n trong hinh binh hanh sao cho ffie
MB L MC
=ffie
vit
.Tlmtga dQ di6m D bi€t tunffi =1.
z
Biri 4 6
aia4
TrCn
bTg
den ta
vi}t zOrc d6u cQng (+) ve Zafi a6u (-).
Cho ph6p
x6a hai d6u tuy y vd vi6t thay vdo d6 mQt d6u cQng ni5u hai ddu d5 x6a
nhau, vd ddu trir trong trucmg hqp ngugc lpi. Lap lpi e0ng viQc
li nhu
d6 4a32 Dn. H6i
trdn bing cdn lpi d6u gi?
cho
x,y
ctia bi6u thirc
ld hai so thlrc duong th6a mdn x+
,F'
= x2 +
y' *!*
1
xy
.
---------- u6t
I
y<1.
"3 ri* gi6trinh6
nh6t.