Algebra viii-sinf. I-chorak test. A-variant

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
   
4. 
   Qo’sh tengsizlik ko’rinishida yozing: a= -1,8  0,4
   

#1 -2a  1,5 #3 -2,2  a  1,4 #4 -2,3  a  1,3 #5 -2,4

5. 
   Qo’sh tengsizlik ko’rinishida yozing: a=2,61  0,01
   

#1 2,7 a 2,72 #2 2,62,62 #3 2,9 #4 2,2  a  2,22

#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%

9. 
   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%

9. 
   Kvadrat tenglamani yeching: 6x²-5x+1=0
   

^{#1 x}1^{=0, x}2^{= - #2 x= #3 x}1^{= - #4 x= - #5 x}1⁼

9. 
   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

9. 
   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
   
10. 
    To’g’ri to’rtburchakning perimetri 30 m ga, yuzi esa 56 m² ga teng .Uning bo’yini toping. #1 5 #2 6 #3 3 #4 8 #5 1
    
11. 
    Tenglamani yeching: x²=7
    

#1 x= #2 x= #3 x=0, x= -5 #4 x=0, x=8 #5 x=0, x= 12

9. 
   Tenglamani yeching: x²=12x
   

#1 x= #2 x= #3 x=0, x= -5 #4 x=0, x=8 #5 x=0, x= 12

9. 
   Tenglamani yeching:
   

9. 
   Tenglamani yeching: x²-1,8x-3,6=0
   

9. 
   Tenglamani yeching: 2x²+x-3=0
   

9. 
   Tenglamani yeching: 2(x-2)(x+2)=0
   

9. 
   Tenglamani yeching:
   
10. 
    Tenglamani yeching: x²+20x+100=0
    

9. 
   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?