Thể tích V của khối chóp S.ABC có đáy ABC là tam giác vuông tại B, cạnh bên SA vuông góc với đáy, biết

Use the correct form of the verbs in parentheses to complete the following sentences.

1. Mary spent hours (repair) ....... her bike.

2. They advised him (not/ cross) ....... the street aganist the red lights.

3. He and his sister (not/ meet) ....... my friends since last Christmas.

4. She (work) ....... here since she left school ?

5. Everyone (read) ....... this novel, let us (discuss) ....... it.

Build sentences based on the words given.

1. There / used / be / church / near / post office/ my town.

2. While / I / open / letter / , / phone / ring.

3. I / be / very pleased / see / Tom / again / after / long time.

4. you / look / thinner. You / lose / weight ?

5. You / think / you / make / radio / work again ?

6. I / buy / book / 5 days ago.

7. A man / said / girl / three / cafe / nearby.

8. When / I / see / Nancy / yesterday / she / drive / car.

9. They / know / each other / 3 month.

10. Nam's teacher / teach / him / he / come / here / 2000.

Tính đạo hàm của hàm số y =  ln   x 2 x

Trong mp Oxy cho vecto(3;3) và đường tròn (C) : x 2 - y 2 - 2 x + 4 y - 4 = 0 . Ảnh (C') là

A. (C') :  x - 4 2 + ( y - 1 ) 2 = 4

B. (C') :  x - 4 2 + ( y - 1 ) 2 = 9

C. (C') :  x + 4 2 + ( y + 1 ) 2 = 4

D. (C') :  x 2 + y 2 + 8 x + 2 y - 4 = 0

Cho hai số phức z 1 = 4 - i, z 2 = -2 + 3i. Tìm phần ảo của số phức z 1 z 2 ¯

A. - 10 13

B. 10 13

C. 11 13

D. - 11 13