Diskret tuzilmalardan 1-oraliq nazorat varianti
№ 25
Agar A = {x∈N: x2 + x − 20 = 0}, B = {x∈R: x2 − 7 x +12 = 0 }, u holda A ∩ B nimaga teng?
A) {− 5;4} B) {4} C) {4;3} D) ∅ E) to`g`ri javob yo`q
2. А={1, 2,3} и В={a, b,c} to`plamlar Dekart ko`paytmasidan munosabatlar aniqlangan. Bulardan qaysi biri biyektiv funksiya bo`ladi: f: A→B ?
A) {(1,b)} B) {(1,a),(2,b)} C) {(1,a), (2,c)} D) {(1,a),(3,c),(2,a),(2,b)}
E) {(1,b),(2,a),(3,c)}
3.А={1,2,3,4,5}, B={3,5,7}, C={3} to`plamlar berilgan. Quyidagilardan qaysi biri to`g`ri:
a) A⊆B б)А⊆С в) B⊆A г) С⊆А д) В⊆С е)С⊆В
A) а, б, д B) б, д C) г, е D) д E) е
4. А to`plam 2 ga bo`linadigan 5 ta sonni, 3 ga bo`linadigan 7 ta va 6 ga bo`linadigan 2 ta sonni o`z ichiga olgan. Agar A t`oplamning elementlari 2 ga yoki 3 ga bo`linadigan bo`lsa, A ning nechta elementi bor?
A) 60 B) 10 C) 30 D) 35 E) 56
5. n ta elementdan k tadan guruhlashlar soni
A) B) C) D) E)
6. Mashinada haydovchini ham hisobga olganda 6 ta o`rin bor. 6 kishidan 4 tasida haydovchilik guvohnomasi bo`lsa, ularni nechta ususlda joylashtirish mumkin?
A) 1440 B) 240 C) 480 D) 360 E) 2880
7. Agar A = {x∈N: x2 + x − 20 = 0}, B = {x∈R: x2− 7 x +12 = 0 },u holda A ∩ B =?
A) {4} B) {5} C) {4,5} D) {6}
8. Quydagini soddalashtiring: A \B A B ) \ A
А) ∅ B) A B C) A B D) A B
9. Quydagi to’plamlarni dekart ko’paytmasi neshta elemendan iborat bo’ladi. A = {1;2;3} va B = {3;4}
A) 10 B) 15 C) 30 D) 6 E) 16
10. To’plamlarni dekart ko’paytmasida А={a, b} va В={1,2} munosabatlar aniqlangan.Qaysi munosabat suryektivlik funksiyasi f: A→B bo’ladi?
A) {(a,1), (b,2)} B) {(a,1),(b,1),(a,2)} C) {(a,2)} D) {(a,2),(b,2)}
11 . 52!/50! ni hisoblang.
A) 2652 B) 2684 C) 2680 D) 2180 E) 2120
12. Hisoblang.
A) 204 B) 9 C) 260 D) 229 E) 250
13. (x+2)7 binom yoyilmasining 6-hadi oldidagi koeffitsiyentni toping.
A) 12 B) 10 C) 6 D) 21 E) 12
14. Tenglamani yeching.
A) 12 B) 10 C) 6 D) 4 E) 12
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