REPITITSION TEST 3
JASUR ERGASHEV
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@matematika_informatika
2-variant.
MATEMATIKA
1.
x ∙ y−
x ∙ z >0
va
z ∙ y <0
bo`lsa, quyidagilarning qaysi biri
barcha haqiqiy sonlar uchun to`g`ri?
A) xz>0 B) xy>0 C) z+x<0 D) xyz>0 E) y+z>0
2.
4 x
2
+(
m+2) x+m+1=0
tenglamaning ildizlridan biri,
ikkinchisiga qarama-qarshi bo`lsa, m ni toping?
A) 0 B) 3 C) 2 D) -3 E) -2
3. Ikki xonali sonning birlar xonasidagi raqam o`nlar xonasidagi
raqamdan 5 ta ortiq. Shu son raqamlarini teskari tartibda yozib,
undan berilgan son ayrilsa, ayirma nechaga bo`linadi?
A) 9; 4 B) 9; 5 C) 4; 5 D) 5; 8 E) 9; 8
4. OX o`qiga parallel bo`lib
A (2018
;−2019 )
nuqtadan o`tuvchi
to`g`ri chiziq tenglamasini toping?
A)
x=−2019
B)
y=−2019
C)
x=2018
D)
x=2019
E)
y=2018
5.
6 x
2
−
5 x+1=0
tenglamaning ildizlari
cosα
va
cosβ
bo`lsa,
hamda
α , β−I
chorakda joylashgan bo`lsa
cos (α+ β)
ning
qiymatini toping.
A)
3−2
√
6
6
B)
1−2
√
6
6
C)
5−2
√
6
6
D)
2
√
6−1
6
E)
2
√
6−3
6
6. Eritma tarkibida 60 gr tuz bor. Undan 400 gr suv olindi,
tuzning konsentratsiyasi esa 3,5 marta ortdi.
Dastlabki eritmaning og`irligini aniqlang?
A) 560 B) 650 C) 720 D) 270 E) aniqlab bo`lmaydi
7.
(
x−3)
x
2
−
7
x
>
1
tengsizlikni yeching.
A)
(
3 ;4 )
B)
(
3 ;4 )
∪(7
;∞)
C)
(
7 ;∞)
D)
(
0 ;1)
∪(7
;∞)
E)
(−
1 ;1)
∪(7
; ∞)
8.
tga=
√
x +3
2
;
tgβ=
√
x−3
2
va
α +
β=45
°
tenglamani
qanoatlantiruvchi x sonining nechta natural bo`luvchisi bor?
A) 0 B) 3 C) 1 D) 14 E) 31
9.
1
4+lgx
+
2
2−lgx
=
1
tenglamaning eng katta ildizini eng
kichik ildiziga nisbatini toping?
A) 1/100 B) 100 C) 10 D) 1/10 E) 1
10.
9
2 x +2
+
x
x−1
≥
1−3 x
2−2 x
tengsizlikning nomanfiy yechimlari
nechta?
A) 0 B) 8 C) 7 D) 6 E) 1
11.
n
ta hadining yig`indisi
n
2
+
2
n
bo`lgan arifmetik
progressiyaning umumiy hadini aniqlang?
A)
2
n+1
B)
3
n−2
C)
2
n+3
D)
2 n−1
E)
3 n−1
12.
{
√
x+
y
2
+
√
x−
y
3
=
14
√
x + y
8
−
√
x−
y
12
=
1
tenglamalar sistemasi yechimlari
yig`indisini hisoblang.
A) 128 B) 132 C) 108 D) 102 E) 31
13.
x
2
+
px +
q
tenglamaning har bir ildizini 2 ga oshirib,
so`ng 2 martadan kamaytirib yangi kvadrat tenglama hosil qilindi.
Agar uning ozod hadi
q+64
4
ga teng bo`lsa, p ning qiymatini
aniqlang?
2 sm ga suriladi. Arqonning avvalgi uzunligi necha sm?
A) 60 B) 50 C) 30 D) 40 E) 20
14.
√
a
2
(2018−a)
va
a
√
(2018−a)
2
ifodalar qaysi oraliqda teng
bo`ladi?
A)
¿
B)
¿
C)
¿
D)
[
0 ;2018]
E)
¿
15. j parametrning qanday qiymatida
(
x
2019
+
x
2018
+
x
2017
+
…+x+1)∙( x + j)
ifoda
ko`phad ko`rinishida yozilganda ko`phadda
x
2018
qatnashmaydi?
A) -2 B) 2 C) 0 D) -1 E) 1
16.
[
2 x−1
2
]
≤ x
tengsizlikni qanoatlantiruvchi natural sonlar
nechta? [a]-a sonining butun qismi.
A) 2 ta B) 3 ta C) 1 ta D) cheksiz ko`p E) aniqlab bo`lmaydi
17.
3
4
15
:
(
3
1
2
+
x
)
:21
3
7
−
1
3
8
=
5
8
tenglamani yeching.
A) 31,5 B) 3,25 C) 31,85 D) 18,5 E) 32,5
18.
−
cos 9 x−sin 5 x−cosx
sin 9
x +cos 5
x−
sinx
=
?
A)
tg5 x
B)
−
ctg 5 x
C)
−
tg5 x
D)
tg 4
x
E)
ctg 4
x
19.
x
√
2019+
x
√
2018=2 ∙
x
√
√
2019
∙
√
2018
tenglamaning nechta
ildizi bor?
A)
∅
B) 1 C) 2 D) aniqlab bo`lmaydi E) cheksiz ko`p
20.
y=2018
x−2019
funksiya
y=
ax+
b
funksiyaga
perpendikulyar va
y=cx+d
funksiyaga parallel bo`lsa
a+
d
ning
qiymatini aniqlang?
A) 2018 B) 2019 C) 1 D) -1 E) aniqlab bo`lmaydi
21. Rasmda
f (
x )
funksiya hosilasining grafigi keltirilgan.
f (
x )
funksiya grafigiga [-3; 5] oraliqda OX o`qiga parallel bo`lgan nechta
urinmasi bor?
A) 7 B) 6 C) 5 D) 4 E) 8
22.
2 sin
3
x +cos
2
2 x=sinx
tenglamani yeching.
A)
π
4
+
πk ;
π
6
+
πk
3
B)
π
4
+
πk ;
π
6
+
2
πk
3
C)
π
4
+
πk
2
;
π
6
+
2
πk
3
D)
π
6
+
πk
3
E)
∅
23.
{
x
√
y
=
y
y
√
y
=
x
4
sistema ildizlarini ifodalovchi nuqtalar orasidagi
masofani toping? (x>0)
A)
√
12
B)
√
10
C)
2
√
2
D)
√
2
E) 3
24.
cosx=
|
2018 x
|
tenglama nechta ildizga ega?
A) 1 B) 2 C) 0 D) 3 E) aniqlab bo`lmaydi.
25.
|
x−1
|
+
|
x+1
|
+
|
x−2
|
+
|
x +2
|
+
…+
|
x−500
|
+
|
x+500
|
=
1000
x
tenglamani yeching.
A)
x=500
B)
x ≥ 100
C)
x ≥ 500
D)
x >10
E)
x <500
26. Dastlabki 10 ta ketma-ket tub sonlar yonam-yon yozildi. Xosil
bo`lgan sondan 6 ta raqam o`chirildi. Natijada eng katta son hosil
bo`ldi. Hosil bo`lgan sonning 3-raqamini toping?
A) 3 B) 2 C) 1 D) 6 E) 5
27.
Agar 0 ga teng bo`lmagan haqiqiy sonlar uchun
xyz=
x +
y +
z
va
yz=
x
2
sharni qanoatlantirsa
x
2
ning eng kichik qiymatini
toping?
A) -1 B) 3 C)
−
√
3
D) 2 E) aniqlab bo`lmaydi
28. Quyidagilarning qaysi biri o`xshash birhad hisoblanadi?
A) -31
a
2
b
va
3 a
2
b
B) 31
a
2
b
2
va 31
a
2
b
C) 22
a
2
b
2
va -22
a
2
b
D) ab va
a
2
b
2
E)
a
3
va
b
3
29.
(a+ b)
8
ko`phadni o`rtada turgan ifodasining koeffitsiyentini
aniqlang? A) 70 B) 56 C) 28 D) 35 E) 31
30.
x−1
√
3
√
2
3 x−1
−
3 x−7
√
8
x−3
=
0
tenglama ildizining uchlanganini
toping? A) 5 B) 9 C) 4 D) 8 E) 6
31. Ucell kompaniyasida 4 xil tarif mavjud. 1. Oddiy 2.
Fresh
3. Ko`proq muloqot 4. VIP va ular uchun to`lovlar quyidagi
jadvalda berilgan. Azamat kuniga 40 daqiqa gaplashadi va 10 ta sms
jo`natadi. Aziza kuniga 20 daqiqa gaplashadi va 5 ta sms jo`natadi.
Alisher kuniga 70 daqiqa gaplashadi va 40 ta jo`natadi. Azamat,
Aziza va Alisher qaysi raqamdagi tariflarga ulanishi kerak?
Tarif
lar
№
Abonent
to`lovi
1 sms
narxi
1 daqiqa
so`zlashuv
1
0,1 $
0,02 $
0,03 $
2
0,5 $
0,01 $
0,02 $
3
0,8 $
0,01 $
0 $
4
3 $
0 $
0 $
A) 2, 3, 4 B) 1, 1, 4 C) 3, 3, 4 D) 3, 1, 3 E) 2, 4, 1
32.
2019 x
3
+
2018 x +1−2019 x
2
=(
x−1) ∙ P ( x )+2019
tenglamani qanoatlantiruvchi P(x) ko`phad quyidagilardan qaysi
biriga teng?
A)
2018 x
2
+
2019
B)
2019 x
2
−
2018
C)
2019 x
2
+
2018
D)
2018 x
2
−
2019
E)
2019 x
2
+
2019
33.
y=2
x +1
va
y=
x +2
to`g`ri chiziqlar orasidagi burchakni
aniqlang? A)
α=arctg
1
3
B)
α=arccos
1
3
C)
π
4
D)
π
3
E)
α=
arctg 3
34. Arifmetik progressiya uchun
a
1
=
2,5
b
1
=
7,5
va
a
100
+
b
100
=
10
bo`lsa
a
1
+
b
1
, a
2
+
b
2
, a
3
+
b
3
… a
n
+
b
n
ketma-
ketlikning dastlabki 700 ta hadi yig`indisini toping?
A) 100 B) 700 C) 7000 D) 1000 E) 10
35.
ax
2
+
bx +
c
kvadrat uchhadni ko`paytuvchilarga ajrating.
D=0
.
A)
a
(
x−x
1
) (
x−
x
2
)
B)
(
x−x
1
) (
x−
x
2
)
C)
a /
c
(
x−x
1
) (
x−
x
2
)
D)
a
(
x−x
1
)
2
E)
a /
c
(
x−x
1
)
2
36. Ko`paytmasi 930 ga, umumiy natural bo`luvchilari 1 ga teng
bo`lgan ketma-ket natural sonlar ayirmasini toping
A) 1 B) 2 C) 5 D) 3 E) aniqlab bo`lmaydi