Algebra viii-sinf. I-chorak test. A-variant
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8-sinf-uchun-Algebradan-4-variantli-testlar
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1. Hisoblang: ( ) 7
)( 7 10
#1 10 #2 3 #3 7 #4 -7 #5 70
2. Hisoblang: 225
01 , 0 196 #1 21 #2 1,4 #3 1,5 #4 210 #5 TJY 3. Tenglamani yeching:
7 ) 7 ( 2 #1
#2 x 7 #3 x
7 #4 x 7 #5 x 7 4. x
2 +5x-6=0 kvadrat tenglamani kichik ildizini katta ildiziga nisbatini toping #1 6#2 -6#3 #4 - #5 1 5. x
2 -px+8=0 tenglamaning ildizlaridan biri 4 ga teng.Bu tenglamaning barcha koyeffitsiyentlari yigindisini toping #1 3#2 2#3 15#4 14#5 4 6. m ning qanday qiymatlarida x 2 -4mx+48=0 tenglamaning ildizlaridan biri bosh qasidan 3 marta kichik bo'ladi? #1 2#2 -4;4#3 -3;3 #4 4 #5 -2;2 7.
=0 tenglamani yeching #1 1#2 1; #3 #4 5#5 8.Tenglamani yeching: x 2 =64 #1 x 1,2
= 8 #2 x=8 #3 x=-8 #4 x=32 #5 9. Tenglamani yeching: x 2 +9x=0
#1 x 1,2
= -9 #2 x 1,2
= 3 #3 x 1,2
=9 #4 x 1 =9, x 2 =0 #5 x 1 =0, x
2 = -9 10. Kvadrat tenglamani yeching: x 2 -7x+10=0 #1 x 1 =-2, x 2 =2 #2 x 1 =-5, x
2 =2 #3 x 1 =5, x
2 =1 #4 x 1 =2, x
2 =5 #5 TJY 11. x 2
1 va x
2 ildizlari x 2 =2x
1 shartni qanoatlantiradi.Ildizlari yig’indisini toping #1 8 #2 -2 #3 -4 #4 -6 #5 10 12. x
2 +px+3=0 kvadrat tenglamaning x 1 va x
2 ildizlari x 2 =3x
1 shartni qanoatlantiradi. x 2 ni toping #1 #2
#3 #4 10 #5 3 13. 3x 2
1 va x
2 ildizlari bo’lsa ni toping #1 - #2 17 #3 3 #4 32 #5 14. ax 2
, x esa noma’lum ko’rinishidagi tenglama…tenglama deyiladi #1 Bikvadrat #2 kvadrat #3 chiziqli #4 trigonometrik #5 kasr-ratsional 15. ax 4
, x esa noma’lum ko’rinishidagi tenglama…tenglama deyiladi #1 Bikvadrat #2 kvadrat #3 chiziqli #4 trigonometrik #5 kasr-ratsional 16. Ildizlari 10 va -2 bo’lgan kvadrat tenglama tuzing: #1 x
2 -8x-20=0, #2 x 2 -12x+32=0 #3 x 2 -4x-5=0 #4 x 2 +7x+12=0 #5 x 2 -2x-15=0 17. Ildizlari 5 va -3 bo’lgan kvadrat tenglama tuzing: #1 x
2 -8x-20=0, #2 x 2 -12x+32=0 #3 x 2 -4x-5=0 #4 x 2 +7x+12=0 #5 x 2 -2x-15=0 18. Kvadrat uchhadni ko’paytuvchilarga ajrating: 2x 2 -x-1 #1 (x-2)(x-3) #2 (x-1)(x+5) #3 (x-3)(x+8) #4 (x+0,5)(x-1) #5 (x+7)(x-6) 19. x
2 +5x-6=0 kvadrat tenglamani ildizlari ko’paytmasini toping 20. x 2
21. 2x 2 +x-a=0 tenglamaning ildizlaridan biri 2 ga teng. Bu tenglamaning barcha koyeffitsiyentlari yig’indisini toping 22. p ning qanday qiymatlarida x 2 +px+15 =0 tenglamaning ildizlaridan biri 3 ga teng bo'ladi? 23. x 2 +2x+1=0 tenglamaning ildizlari x 1 va x
2 bo'lsa + ni hisoblang 24. Tenglamani yeching: (x-1) 4 -5(x-1) 2 +4=0
25. Kasrni qisqartiring:
Algebra VIII-sinf.III chorak testi. D-variant 1. Ifodani soddalashtiring: 12 2 1
2 120
2 1 6 5 #1
30 #2 3
30 #3 2
30 #4 10,5 #5 to’g’ri javob yo’q 2. Ifodani soddalashtiring: (3 ) 2 2 ( : ) 50 2 , 0 18 9 8
#1 -10 #2 10 #3 10 2 #4 -10 2 #5
2 10
3. Hisoblang: 20 5 5 20 4 4
#1 1 #2 20 2 9 9 #3 29 9 #4 2 #5 9 4. x
1 va x
2 x
2 +x-5 tenglamaning ildizlari ekanligi ma'lum. + ning qiymatini toping. #1 10#2 12#3 11#4 9#5 8 5. x
2 +px+q
2 =0 (q 0) tenglama ning qanday qiymatlarida haqiqiy ildizlarga ega emas? #1 [0;2]#2 (0;2]#3 [-2;2]#4 (-2;0) #5 (-2;2) 6. x
2 +2x+1=0 tenglamaning ildizlari x 1 va x
2 bo'lsa - ni hisoblang #1 1#2 3#3 4 #4 0 #5 -2 7. y
4 -2y
2 -8=0 tenglamaning haqiqiy ildizlari ko'paytmasini aniqlang. #1 4#2 16#3 -16 #4 -4 #5 64 8. Tenglamani yeching: x 2 -11=0. #1 x= 11 #2 x
1,2 = 11 #3 x=- 11 #4 x= 2 11 #5 TJY 9. Kvadrat tenglamani yeching: x 2 +x-6=0 #1 x 1 =-3, x 2 =2 #2 x 1 =3, x
2 = -2 #3 x 1,2 =
#4 x 1 =-2, x
2 = -3 #5 x 1,2 =
10. x 2 +6x+q=0 kvadrat tenglamaning x 1 va x
2 ildizlari x 2 =2x
1 shartni qanoatlantiradi.q ni toping #1 8 #2 -2 #3 -4 #4 -6 #5 10 11. x
2 +6x+q=0 kvadrat tenglamaning x 1 va x
2 ildizlari x 2 =2x
1 shartni qanoatlantiradi.Ildizlari ko’paytmasini toping #1 8 #2 -2 #3 -4 #4 -6 #5 10 12. x
2 +px+3=0 kvadrat tenglamaning x 1 va x
2 ildizlari x 2 =3x
1 shartni qanoatlantiradi. Ildizlari yig’indisini toping #1 #2
#3 #4 10 #5 3 13. 3x 2
1 va x
2 ildizlari bo’lsa ni toping #1 - #2 17 #3 3 #4 32 #5 14. Umumiy kvadrat tenglama ildizlari formulasini toping: #1 x=0 #2 x 1,2 =
#4 #5 x= - 15. x 2
#1 Bikvadrat #2 kvadrat #3 chiziqli #4 keltirilgan kvadrat #5 kasr-ratsional 16. Ildizlari 4 va 8 bo’lgan kvadrat tenglama tuzing: #1 x 2
2 -12x+32=0 #3 x 2 -4x-5=0 #4 x 2 +7x+12=0 #5 x 2 -2x-15=0 17. Kvadrat uchhadni ko’paytuvchilarga ajrating: x 2 -5x+6 #1 (x-2)(x-3) #2 (x-1)(x+5) #3 (x-3)(x+8) #4 (x+0,5)(x-1) #5 (x+7)(x-6) 18. Kvadrat uchhadni ko’paytuvchilarga ajrating: x 2 +x-42
#1 (x-2)(x-3) #2 (x-1)(x+5) #3 (x-3)(x+8) #4 (x+0,5)(x-1) #5 (x+7)(x-6) 19. x
2 +5x-6=0 kvadrat tenglamani kichik ildizini katta ildiziga nisbatiga qarama-qarshi sonni toping 20. x 2
21. 2x 2 +x-a=0 tenglamaning ildizlaridan biri 2 ga teng. Bu tenglamaning kata ildizini kichik ildiziga nisbatini toping 22. p ning qanday qiymatlarida x 2 +px+15 =0 tenglamaning ildizlaridan biri 15 ga teng bo'ladi? 23. x 2 +2x+1=0 tenglamaning ildizlari x 1 va x
2 bo'lsa x 1 +x
ni hisoblang 24. (x-1) 4 -5(x-1)
2 +4=0 tenglamaning ildizlari yig’indisini toping: 25. Kasrni qisqartiring:
Algebra VIII-sinf.IV-chorak test.A-variant 1.Sonning aniq qiymati 1,483, taqribiy qiymati 1,48 bo’lsa,yaqinlashish xatoligini toping: #1 0,003 #2 0,007 #3 1,005 #4 - 0,007 #5 0,002 2.Sonning aniq qiymati 1,283, taqribiy qiymati 1,281 bo’lsa,yaqinlashish xatoligini toping: #1 0,003 #2 0,007 #3 1,005 #4 - 0,007 #5 0,002 3. Sonning aniq qiymati , taqribiy qiymati bo’lsa,yaqinlashish absolyut xatoligini toping: #1
0,4
#1 -2 , 1 a #3 -2,2 4 ,
a #4 -2,3 3 ,
a #5 -2,4
5. Qo’sh tengsizlik ko’rinishida yozing: a=2,61 0,01
#1 2,7 a 2,72 #2 2,662 , 2 #3 2,9 #4 2,2 22 , 2 a #5 1,99 a
6. ni 0,01 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,13 #2 0,32 #3 0,42 #4 0,47 #5 0,53 7. ni 0,01 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,13 #2 0,32 #3 0,42 #4 0,47 #5 0,53 8. ni 0,001 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,357 #2 0,214 #3 0,643 #4 0,308 #5 0,185 9. Xonaning uzunligi (10 0,02) m ga teng.O’lchashning nisbiy xatoligini aniqlang: #1 4% #2 5% #3 2% #4 8% #5 1,25% 10. Ikki qishloq orasidagi masofa (100 2)km ga teng. O’lchashning nisbiy xatoligini aniqlang: #1 1% #2 2% #3 3% #4 4% #5 5% 11. Sonni yuzdan birgacha yaxlitlang.Yaxlitlashning nisbiy xatoligini toping: 5,7635 #1 5,76; 0,061% #2 4,46; 0,078% #3 3,71; 0,094% #4 2,16; 0,139% #5 2,29; 0,179% 12. Sonni yuzdan birgacha yaxlitlang.Yaxlitlashning nisbiy xatoligini toping: 1,093 #1 5,76; 0,061% #2 4,46; 0,078% #3 3,71; 0,094% #4 2,16; 0,139% #5 2,29; 0,179% 13. Kvadrat tenglamani yeching: 6x 2 -5x+1=0
#1 x 1 =0, x 2 = - #2 x= #3 x 1 = -
#4 x= - #5 x 1 = 14. Tenglamalar sistemasini yeching: x+y=5 xy=4 #1 x= -4, y= -1 #2 x= 1 , y= -1 #3 x=4, y= -1 #4 (1;4) va (4;1) #5 15. Ikki sonning ayirmasi 3 ga , ularning ko’paytmasi 28 ga teng.Shu sonlardan kattasini toping. #1 8 #2 4 #3 7 #4 11 #5 65 16. To’g’ri to’rtburchakning perimetri 30 m ga, yuzi esa 56 m 2 ga teng .Uning bo’yini toping. #1 5 #2 6 #3 3 #4 8 #5 1 17. Tenglamani yeching: x 2 =7
#1 x= #2 x=
#3 x=0, x= -5 #4 x=0, x=8 #5 x=0, x= 12 18. Tenglamani yeching: x 2 =12x
#1 x= #2 x=
#3 x=0, x= -5 #4 x=0, x=8 #5 x=0, x= 12 19. Tenglamani yeching:
2 -1,8x-3,6=0
21. Tenglamani yeching: 2x 2 +x-3=0
22. Tenglamani yeching: 2(x-2)(x+2)=0
23. Tenglamani yeching:
24. Tenglamani yeching: x 2 +20x+100=0
25. Bronza tayyorlash uchun 17 qism mis, 2 qism rux va bir qism qalayi olinadi. 400 kg bronza olish uchun yuqoridagi metallarning har biridan qanchadan olish kerak? Algebra VIII-sinf.IV-chorak test.B-variant
1.Sonning aniq qiymati 1,387, taqribiy qiymati 1,38 bo’lsa,yaqinlashish xatoligini toping: #1 0,003 #2 0,007 #3 1,005 #4 - 0,007 #5 0,002 2. Sonning aniq qiymati , taqribiy qiymati bo’lsa,yaqinlashish xatoligini toping: #1
3. Sonning aniq qiymati , taqribiy qiymati bo’lsa,yaqinlashish absolyut xatoligini toping: #1
4. Qo’sh tengsizlik ko’rinishida yozing: a= -1,8 0,5
#1 -2 , 1 a #3 -2,2 4 ,
a #4 -2,3 3 ,
a #5 -2,4
5. Qo’sh tengsizlik ko’rinishida yozing: a=2,91 0,01
#1 2,7 a 2,72 #2 2,662 , 2 #3 2,9 #4 2,2 22 , 2 a #5 1,99 a
6. ni 0,01 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,13 #2 0,32 #3 0,42 #4 0,47 #5 0,53 7. ni 0,001 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,357 #2 0,214 #3 0,643 #4 0,308 #5 0,185 8. ni 0,001 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,357 #2 0,214 #3 0,643 #4 0,308 #5 0,185 9. Xonaning uzunligi (5 0,04) m ga teng.O’lchashning nisbiy xatoligini aniqlang: #1 4% #2 5% #3 2% #4 8% #5 1,25% 10. Ikki qishloq orasidagi masofa (100 3)km ga teng. O’lchashning nisbiy xatoligini aniqlang: #1 1% #2 2% #3 3% #4 4% #5 5% 11. Sonni yuzdan birgacha yaxlitlang.Yaxlitlashning nisbiy xatoligini toping: 4,4635 #1 5,76; 0,061% #2 4,46; 0,078% #3 3,71; 0,094% #4 2,16; 0,139% #5 2,29; 0,179% 12. Sonni o’ndan birgacha yaxlitlang.Yaxlitlashning nisbiy xatoligini toping: 2,2941 #1 2,3; 2,6% #2 2,2; 2,5% #3 2,3; 0,3% #4 2,3; 0,4% #5 2,3; 0,26% 13. Kvadrat tenglamani yeching: 12x 2 +7x+1=0
#1 x 1 = #2 x 1 = - #3 x 1 = #4 x= #5 x= 14. Tenglamalar sistemasini yeching: x+y=4 x 2 -y 2 = 8
#1 x= 2, y= -2 #2 x=5, y= -1 #3 x= 4, y=0 #4 x=1, y= 3 #5 x=3, y=1 15. Ikki sonning ayirmasi 3 ga , ularning ko’paytmasi 28 ga teng.Shu sonlar yig’indisini toping. #1 13 #2 4 #3 7 #4 11 #5 65 16. To’g’ri to’rtburchakning perimetri 30 m ga, yuzi esa 54 m 2 ga teng .Uning enini toping. #1 5 #2 6 #3 3 #4 8 #5 1 17. Tenglamani yeching: x 2 =11
#1 x= #2 x=
#3 x=0, x= -5 #4 x=0, x=8 #5 x=0, x= 12 18. Tenglamani yeching: 1,5x-4x 2 =6,3x-x
2 #1 y=
#2 x=0, x= 9 #3 x=0 , x= -10 #4 y=0, y=9 #5 x=0, x= -1,6 19. Tenglamani yeching:
2 +3x-2=0
21. Tenglamani yeching: 20+8x-x 2 =0
22. Tenglamani ildizi nechta: (x-3)(x-2)=7x-1
23. Tenglamani yeching:
24. Tenglamani yeching: x 2 +18x-208=0 25. Bir maydondan 450 t, yuzi undan 5 ga kam bo’lgan ikkinchi maydondan 400 t kartoshka yig’ishtirib olindi. Agar ikkinchi maydondagi hosildorlik birinchi maydondagiga qaraganda 2 tonna yuqori bo’lgan bo’lsa, har qaysi maydonning hosildorligini aniqlang.
1.Sonning aniq qiymati 1,405, taqribiy qiymati 1,4 bo’lsa,yaqinlashish xatoligini toping: #1 0,003 #2 0,007 #3 1,005 #4 - 0,007 #5 0,002 2. Sonning aniq qiymati , taqribiy qiymati bo’lsa,yaqinlashish absolyut xatoligini toping: #1
0,2
#1 -2 , 1 a #3 -2,2 4 ,
a #4 -2,3 3 ,
a #5 -2,4
4. Qo’sh tengsizlik ko’rinishida yozing: a= -1,8 0,6
#1 -2 , 1 a #3 -2,2 4 ,
a #4 -2,3 3 ,
a #5 -2,4
5. Qo’sh tengsizlik ko’rinishida yozing: a=2,21 0,01
#1 2,7 a 2,72 #2 2,662 , 2 #3 2,9 #4 2,2 22 , 2 a #5 1,99 a
6. ni 0,01 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,13 #2 0,32 #3 0,42 #4 0,47 #5 0,53 7. ni 0,001 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,357 #2 0,214 #3 0,643 #4 0,308 #5 0,185 8. Xonaning uzunligi (5 0,02) m ga teng.O’lchashning nisbiy xatoligini aniqlang: #1 4% #2 5% #3 2% #4 8% #5 1,25% 9. Xonaning uzunligi (4 0,05) m ga teng.O’lchashning nisbiy xatoligini aniqlang: #1 4% #2 5% #3 2% #4 8% #5 1,25% 10. Ikki qishloq orasidagi masofa (100 4)km ga teng. O’lchashning nisbiy xatoligini aniqlang: #1 1% #2 2% #3 3% #4 4% #5 5% 11. Sonni yuzdan birgacha yaxlitlang.Yaxlitlashning nisbiy xatoligini toping: 3,7135 #1 5,76; 0,061% #2 4,46; 0,078% #3 3,71; 0,094% #4 2,16; 0,139% #5 2,29; 0,179% 12. Sonni standart shaklida yozing: 234,087 #1 2,34087*10 2 #2 23,4087*10 #3 2,4*10 2 #4 23,5*10 2 #5 2,34*10 -2
13. Tenglamani yeching: x 4 -5x
2 +4=0
#1 x 1,2
= #2 x
1,2 = #3 x 1 =1, x
2 =4 #4 x
1,2 = #5 14. Ikki sonning ayirmasi 3 ga , ularning ko’paytmasi 28 ga teng.Shu sonlarni toping. #1 7 va 4 #2 8 va 5 #3 7 #4 11 #5 65 15. Ikki sonning ayirmasi 3 ga , ularning ko’paytmasi 28 ga teng.Shu sonlar kvadratlari ko’paytmasini toping. #1 49 #2 4 #3 7 #4 11 #5 65 16. To’g’ri to’rtburchakning perimetri 32 m ga, yuzi esa 55 m 2 ga teng .Uning bo’yi endian qancha uzun. #1 5 #2 6 #3 3 #4 8 #5 1 17. Tenglamani yeching: x 2 +5x=0
#1 x= #2 x=
#3 x=0, x= -5 #4 x=0, x=8 #5 x=0, x= 12 18. Tenglamani yeching: 11y-15=(y+5)(y-3) #1 y= #2 x=0, x= 9 #3 x=0 , x= -10 #4 y=0, y=9 #5 x=0, x= -1,6 19. Tenglamani yeching: x 2 +6x+5=0 20. Tenglamani yeching: 4x 2 -x-14=0
21. Tenglamani yeching: 2x 2 -9x=35
22. Tenglamani yeching:
2 +3x+70=0
24. Tenglamani yeching: x(x-15)=3(108-5x) 25. Oddiy kasrning surati maxrajidan 11 ta kata . Agar shu kasrning suratiga 5, maxrajiga 12 qo’shilsa, berilgan kasrdan uch marta kichik kasr hosil bo’ladi.Shu kasrni toping.
Algebra VIII-sinf.IV chorak test. D-variant 1.Sonning aniq qiymati 1,453, taqribiy qiymati 1,46 bo’lsa,yaqinlashish xatoligini toping: #1 0,003 #2 0,007 #3 1,005 #4 - 0,007 #5 0,002 2. Sonning aniq qiymati , taqribiy qiymati bo’lsa,yaqinlashish absolyut xatoligini toping: #1
0,3
#1 -2 , 1 a #3 -2,2 4 ,
a #4 -2,3 3 ,
a #5 -2,4
4. Qo’sh tengsizlik ko’rinishida yozing: a=2,71 0,01
#1 2,7 a 2,72 #2 2,662 , 2 #3 2,9 #4 2,2 22 , 2 a #5 1,99 a
5. Qo’sh tengsizlik ko’rinishida yozing: a=2 0,01
#1 2,7 a 2,72 #2 2,662 , 2 #3 2,9 #4 2,2 22 , 2 a #5 1,99 a
6. ni 0,01 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,13 #2 0,32 #3 0,42 #4 0,47 #5 0,53 7. ni 0,001 gacha aniqlikda o’nli kasr ko’rinishida yozing: #1 0,357 #2 0,214 #3 0,643 #4 0,308 #5 0,185 8. Xonaning uzunligi (4 0,02) m ga teng.O’lchashning nisbiy xatoligini aniqlang: #1 4% #2 5% #3 2% #4 8% #5 1,25% 9. Ikki qishloq orasidagi masofa (100 1)km ga teng. O’lchashning nisbiy xatoligini aniqlang: #1 1% #2 2% #3 3% #4 4% #5 5% 10. Ikki qishloq orasidagi masofa (100 5)km ga teng. O’lchashning nisbiy xatoligini aniqlang: #1 1% #2 2% #3 3% #4 4% #5 5% 11. Sonni yuzdan birgacha yaxlitlang.Yaxlitlashning nisbiy xatoligini toping: 2,163 #1 5,76; 0,061% #2 4,46; 0,078% #3 3,71; 0,094% #4 2,16; 0,139% #5 2,29; 0,179% 12. Sonni standart shaklida yozing: 0,00000078 #1 7,8*10 7 #2 7,8*10 -7 #3 78*10 -7 #4 0,78*10 -5 #5 0,078*10 5
13. Tenglamani yeching: x 4 -4x 2 -5=0
#1 x 1,2
= - #2 x
1,2 =5 #3 x 1,2 =
1,2 =
14. Ikki sonning ayirmasi 3 ga , ularning ko’paytmasi 28 ga teng.Shu sonlardan kichigini toping. #1 2 #2 4 #3 7 #4 11 #5 65 15. To’g’ri to’rtburchakning perimetri 30 m ga, yuzi esa 56 m 2 ga teng .Uning bo’yi endian qancha uzun. #1 5 #2 6 #3 3 #4 8 #5 1 16. To’g’ri to’rtburchakning perimetri 22 m ga, yuzi esa 24 m 2 ga teng .Uning bo’yi endian qancha uzun. #1 5 #2 6 #3 3 #4 8 #5 1 17. Tenglamani yeching: x 2 =8x
#1 x= #2 x=
#3 x=0, x= -5 #4 x=0, x=8 #5 x=0, x= 12 18. Tenglamani yeching: 3x(x+2)=2x(x-2) #1 y= #2 x=0, x= 9 #3 x=0 , x= -10 #4 y=0, y=9 #5 x=0, x= -1,6 19. Tenglamani yeching: x 2 +3,5x-2=0 20. Tenglamani yeching: x 2 -x-2=0
21. Tenglamani yeching: (x+5)(x-3)=2x-7
22. Tenglamani yeching:
23. Tenglamani yeching: x 2 -12x+11=0
24. Tenglamani yeching: (x-3) 2 +(x+4)
2 -(x-5)
2 =17x+24
25. Sport musobaqalarida VII-sinf o’quvchisi 60 m masofani 9 s da, X-sinf o’quvchisi esa 100 m masofani 14,8 s da bosib o’tdi. O’quvchilar o’zgarmastezlik bilan chopganlar deb hisoblab, kim tezroq yugurganini aniqlang. Download 443.61 Kb. Do'stlaringiz bilan baham: 
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