Chứng minh

\(\sqrt{\dfrac{2-\sqrt{3}}{2+\sqrt{3}}}+\sqrt{\dfrac{2+\sqrt{3}}{2-\sqrt{3}}}=4\)

Tính:

\(\sqrt{\dfrac{2+\sqrt{3}}{\sqrt{2}}}\)

A. to producing

B. producing

C. to produce

D. produce

Cho hàm số y = − x 2 + 4 x − 3 , có đồ thị (P). giả sử d là đường thẳng đi qua A(0; -3) và có hệ số góc k. Xác định k sao cho d cắt đồ thị (P) tại 2 điểm phân biệt, E, F sao cho ∆ O E F  vuông tại O (O là gốc tọa độ) . Khi đó

A.  k = − 1 k = 3

B.  k = − 1 k = 2

C.  k = 1 k = 2

D.  k = 1 k = 3

A. taking

B. took

C. taken

D. take

V. Đặt câu hỏi cho phần gạch chân.

He goes to Nguyen Du School.

Which ...................................................?

Choose the correct word A, B or C for each gap to complete the following passage.

Yesterday, Carlos went (1) ……………… La Tomatina. The festival is held on were the last Wednesday of August every year in Būnol, Spain. (2) ……………… were thousands of people there. In the morning, many people tried (3) ……………… up the pole to get the ham. At 11 a.m, they (4) ……………… a jet from the water cannons and the chaos began. Bags of tomatoes from trucks were (5) ……………… to the crowds, and they began throwing tomatoes at one another. They all had to wear goggles (6) ……………… their eyes.

After one hour, they saw another jet and stopped (7) ……………… The whole town square (8) ……………… red with rivers of tomato juice. Finally, they tried tomato Paella, a (9) ……………… Spanish rice dish. Together with local people and tourists, they enjoyed the (10) ……………… food and drinks.

Question 4.

A. see

B. saw

C. seen