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

16.5x+2y=4
7x+4y=8 tenglamalar sistemasini x*y dagi qiymatini toping.
A)2 B)3 C)0 D)4
17. Fokuslari OX o’qida bo’lgan giperbolaning mavhum o’qini uzunligi 12 ga teng bo’lsa va u (20;8) nuqtadan o’tsa,bu giperbolaning tenglamasini tuzing.
A)x2/144+y2/36=1 B)x2/100-y2/36=1
C)x2/100+y2/36=1 D)x2/144-y2/36=1
18. M nuqta BC ning o’rtasi ,N nuqta esa AC ning o’rtasi bo’lsin,OA=3 va OB=4 bo’lganda ON vektorni aniqlansin.
A)5,5 B)5 C) -0,5 D)0,5
19. 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
20.A(6:7); B(3:3); C(1:-5) nuqtalardan o’tuvchi shaklning perimetrini toping.
A)18+√68 B)18+√64 C)16+√68 D)16
21.2x-3y+z-2=0
x+5y-4z+5=0
4x+y-3z+4=0 tenglamalar sistemasini yeching va x ni qiymatini toping.
A)6 B)5 C)10 D)4
22.(a ) ⃗va b ⃗ nokollinear vektorlar berilgan.|a ⃗ |=|b ⃗ |=4
bo’lsa,(a ⃗+b ⃗) bilan (a ⃗-b ⃗ ) qanday burchak tashkil etadi.
A)30° B)45° C)60° D)90°
23.m ⃗(-3:1) va n ⃗(5:-6) vektorlar berilgan.a ⃗=n ⃗-3m ⃗ vektorning koordinatalarini toping.
A)(14;-9) B)(4;-3) C)(14;-3) D)(9;3)
24. M nuqta BC ning o’rtasi,N nuqta AC ning o’rtasi bo’lsin,OA=3 va OB=4 bo’lganda OM vektorni aniqlang.
A)0,5 B)-0,5 C)5 D)5,5
25. Fokuslari OX o’qida bo’lgan giperbolaning mavhum o’qini uzunligi 12 ga teng bo’lsa va u (20;8) nuqtadan o’tsa,bu giperbolaning tenglamasini tuzing.
A)x2/144+y2/36=1 B)x2/100-y2/36=1
C)x2/100+y2/36=1 D)x2/144-y2/36=1
26.a ⃗(2;-3)va( b) ⃗(-2;-3)vektorlar berilgan.m ⃗=a ⃗-2(b ) ⃗vektorning koordinatalarini ko^' rsating.
A)(6;3) B)(-3;6) C)(-2;-9) D)(2;-3)
27. f(x)=(tgx+ctgx)² funksiyaning boshlang’ich funksiyasini toping.
A)tgx-ctgx+C B)tgx-ctgx+2x+C
C)tgx-ctgx+4x+C D)tgx-ctgx-4x+C