Cho ba tập hợp 𝐴 = [−2; 4];𝐵 = {𝑥 ∈ 𝑅, 0 ≤ 𝑥 < 4}; 𝐶 = {𝑥 ∈ 𝑅, |𝑥| > 1}. Khi đó :
A. 𝐴 ∩ 𝐵 ∩ 𝐶 = (1; 4)

B. 𝐴 ∩ 𝐵 ∩ 𝐶 = [1; 4]
C. 𝐴 ∩ 𝐵 ∩ 𝐶 = (1; 4]

D. 𝐴 ∩ 𝐵 ∩ 𝐶 = [1; 4)

Cho hai tập hợp 𝐴 = {𝑥 ∈ 𝑍, (𝑥 + 3)($x^2$ − 3) = 0} và 𝐵 = {𝑥 ∈ 𝑅, $x^2$ + 6 = 0}. Khi đó :

A. B \ A = B

B. 𝐴 ⊂ 𝐵

C. A \ B = A

D. 𝐴 ∩ 𝐵 = A

6. My house...................broken into last night.
A. are
В. is
C. was
D. were
7. The details should..................carefully.
C. was checked
B. check

A. is checked
D. be checked
8. If Mary doesn't improve in math, we..................have to find a tutor for her.
A. will
В. can
C. should
D. would
9. The journey to the village is very...........................
B. interesting
A. interested
C. disinterested
D. interest
10. I don't like using the internet because it has some.........................................
A. benefits
B. advantages
C. limitations
D. disadvantage

Tìm x biết

1. (x – 4)2 - 36 = 0

2. (x + 8)2 = 121

3. x2 + 8x + 16 = 0

4. 4x2 – 12x = -

1. I've played the piano...................
A. two years ago
B. since 1995
C. before 1995
D. tomorrow
2. He................me about it last night.
B. have told
A. tells
C. has told
D. told
3. The meeting will................in London next week.
A. be held
B. is held
C. be hold
D. are hold
4. Bananas.................to Europe every year.
A. are exported
В. ехports

C. is exported
D. exported

5. She wishes she....................a palace now.

A. own

B. owned

C. is owning
D. would own