Cho  C = − 1 6 + 5 12 + 7 12 + 11 24 + − 5 6  và  D = − 5 7 + − 2 7 + 3 4 + 1 4 + − 1 5 + 7 15 . Chọn câu đúng.

A. C = − 11 24 ; D = 4 15

B. C = 11 24 ; D = − 4 15

C. C = 13 24 ; D = 4 15

D. C = 11 24 ; D = 4 15

Tính diện tích của tam giác đều ABC biết chu vi tam giác ABC bằng 18cm

A.  9 ( c m 2 ) 18 3 ( c m 2 )

B.  18 3 ( c m 2 )

C.  9 3 ( c m 2 )

D.  27 3 ( c m 2 )

Tính lượng kết tủa bạc thu được khi tiến hành tráng gương hoàn toàn dd chứa 2,16g glucozơ.(Biết H = 60%)

A. 2,592g

B. 1,296

C. 1,836

D. 1,5552

Cho F x  là một nguyên hàm của hàm số: e x 2 + e − x tanx , biết F 0 = 2.  Khi đó hàm số F x là

A.  2 e x − ln cos x

B.  2 e x + ln cos x

C.  2 e x − ln sin x

D.  2 e x + ln sin x

Read the passage and choose the best answer for each blank.

MARIA’S HOMECOMING

When the bus ... (6) ... in a small square, Maria was reading her magazine and didn’t realize that she had arrived at her destination. “This is Santa Teresa,” Martin said. “You’ve arrived home!” I suppose your cousin will be ... (7) ... for us. Come on. I’ll carry the bags.” Maria thought, “All those years when I ... (8) ... in New York, I used to dream if this moment. And now it’s real, I can’t believe it! Here I am, I’m really standing in the square.” Santa Teresa was Maria’s birthplace, but she often left the town at the age of six. She had some ... (9) ... of the town, and some photos, but did she belong here still? She didn’t know. Nobody was waiting in the square. Perhaps her cousin Pablo hadn’t received Maria’s letter. “What are we going to do now?” asked Martin. “There isn’t ... (10) ... a hotel here!”

Question 6:

A. reached

B. got

C. stooped

D. came