Va to`plamlarning birlashmasini toping.; b c ; d

14. – quyidagi matritsaning turini aniqlang.
A) dioganal matritsa B) kvadrat matritsa C) birlik matritsa D) maxsus matritsa
15. 2x-4y+3z=1
x-2y+4z=3
3x-y+5z=2 tenglamalar sistemasidan y ni toping.
A)0 B)1 C)-1 D)2
16. .ABC teng yonli uchburchakda M nuqta AC asosining o’rtasi.Agar AB=5 va BM=4 bo’lsa,|MB-MC+BA|vektorlarning qiymatini toping.
A)6 B)3 C)9 D)5
17. .Agar xy=4,yz=7 va xz=28 (y>0) bo’lsa,xyz ni toping.
A)-28 B)28 C)27 D)56
18. Agar
X²-5xy+y²=-47
Xy=21 bo’lsa|x+y|+|x-y| ning qiymatini toping.
A)8 B)10 C)12 D)14
19.Agar ab=18,bc=25 va ac=8 bo’lsa,v(abc) nimaga teng.
A)2v15 B)15v2 C)6v5 D)8v3
20.f(x)=x-1-ctg²x funksiyaning boshlang’ich funksiyani toping.
A)x²/2-ctgx+C B)x²/2+ctgx+C C)x²/2-tgx+C D)x²/2+tgx+C
21.|3 -2|
|4 6| bo’lgan determinantni yechimi a bo’lsa,3a ni hisoblang.
A)78 B)76 C)36 D)24
22.a ⃗ va b ⃗ nokollinear vektorlar berilgan.|a ⃗ |=|b ⃗ |=2 bo’lsa,(a ⃗+b ⃗ )bilan (a ⃗-b ⃗ ) qanday burchak tashkil etadi.
A)45° B)90° C)75° D)60°
23. Agar a ⃗(1;-1;3)va b ⃗(4;3;0)
bo’lsa a ⃗ ning qanday qiymatida 2a ⃗+αb ⃗ va b ⃗-a ⃗ vektorlar perpendikulyar bo’ladi.
A)5/6 B)1 C) 2,1 D) -7/11
24. Agar f(x)=x3+5x2+4x+2 bo’lsa, f ‘ (x)=y(1) tenglamaning eng kichik ildizini toping.
A)-6 B)-2 C)-4 D)-1
23. OACB to’g’ri to’rtburchakning OA va OB tomonlariga I va j birlik vektorlar qo’yilgan .Agar OA ning uzunligi 3 ga va OB ning uzunligi 4 ga teng bo’lsa,CO vektorni I va j orqali ifodalang.
A)3i+4j B)-3i-4j C)3i-4j D)4j-3i
24.Ushbu 3sin2x funksiya uchun boshlang’ich funksiyaning umumiy ko’rinishini ko’rsating.
A)-2/3cos2x+C B)-3/2cos2x+C
C)3/2sin2x+C D)-3/2sin2x+C
25.Giperbola tenglamasi tog’ri keltirilgan javobni ko’rsating.
A)x²/a²+y²/b²=1 B)x²/a²-y²/b²=1
C)x²+y²=r² D)x²-y²=r²
26.A = {matematika}
B={informatika}
AUB=?
A){m,a,t,e,I,k,n,f,o,r} B){m,a,t,i,k}
C){e,} D){f,o,r,n}
27. 2-tartibli determinant qiymatinin hisoblang.
|3 -2|
|4 6| =?
A)10 B)12 C)26 D)18
28. Aylana tenglamasini toping.
A)x²-y²=r² B)x²̸a²+y²/b²=1
C)x²+y²=1 D)x²/a²-y²/b²=1
29.5x+2y=4
7x+4y=8 tenglamalar sistemasini x*y dagi qiymatini toping.
A)2 B)3 C)0 D)4
30.Fokuslari OX o’qida bo’lgan giperbolaning haqiqiy o’qini uzunligi 16 ga teng bo’lsa va u (10;-3) nuqtadan o’tsa,bu giperbolaning tenglamasini tuzing.
A)x2/64+y2/16=1 B)x2/16-y2/12=1
C)x2/64-y2/16=1 D)x2/16+y2/12=1