Cho y=\(\frac{1}{x+1}\) phải tịnh tiến ntn để được (P1): \(\frac{1}{x}\)

Cho \(y=2x^2\) phải tịnh tiến ntn để được

\((P1): y = 2x^2 - 4x\)

\((P2): y=2x^2 + 6x\)

Rewrite the following sentences using -ed/ -ing or other endings. Make the necessary changes.

The coincidence amazed us. We were amazed by the coincidence.

The journey tired us. The journey ______.

The experience upset Sylvia. Sylvia ______ .

The experience upset us. The experience ______ .

Gloria enchanted me. Gloria ______ .

I enchanted Gloria. Gloria ______ .

The children delighted us. The children ______ .

The children delighted us. We ______ .

The new building impresses us. The new building ______ .

The new building impresses everybody. Everybody ______ .

Rewrite the following sentences using -ed/ -ing or other endings. Make the necessary changes.

The coincidence amazed us. We were amazed by the coincidence.

The journey tired us. The journey ______.

The experience upset Sylvia. Sylvia ______ .

The experience upset us. The experience ______ .

Gloria enchanted me. Gloria ______ .

I enchanted Gloria. Gloria ______ .

The children delighted us. The children ______ .

The children delighted us. We ______ .

The new building impresses us. The new building ______ .

The new building impresses everybody. Everybody ______ .

Complete the conversation about a holiday. The older people had a nice relaxing time. - Yes, lying on the beach is certainly nice and ______.

2. It was annoying losing that suitcase. - Yes, you must be really ______ about it.

3. That film we saw was amusing. - Laura was certainly ______. She couldn’t stop laughing.

4. The museum was interesting, I thought. - Yes, we had an ______ time there. There was lots to see.

5. I was fascinated by those old photos of the town. - Yes, I thought they were ______ too.

6. The wind-surfing was a thrilling experience for the children. - Yes, they were certainly ______ to have a go.

7. I think I'll go to bed. I'm exhausted. Looking after young children is an ______ job.

8. I was surprised at how good the weather was. - Yes, the amount of sunshine we had was __________.

9. I was tired after we climbed the mountain. - Yes, I think everyone felt ________.

Xét sự biến thiên của:

a) \(f(x) = x^3\)

b) \(f(x) = \sqrt{2-3x}\)

Cho 2 hình bình hành ABCD và AB'C'D'. CMR:

a) \(\overrightarrow{OA} + \overrightarrow{OB} + \overrightarrow{OC} + \overrightarrow{OD} \) với \(O = \) \(AC\cap BD\)

b) \(\bigtriangleup{BC'D}\) và \(\bigtriangleup{B'CD'}\) có cùng trọng tâm

Cho 2 hình bình hành ABCD và AB'C'D'. CMR:

a) \(\overrightarrow{OA} + \overrightarrow{OB} + \overrightarrow{OC} + \overrightarrow{OD} = \overrightarrow{0} = \)\(AC \bigcap BD\)

b) \(\bigtriangleup{BC'D} \) và \(\bigtriangleup{B'CD'}\) có cùng trọng tâm

Chứng minh bằng phản chứng: Với các số tự nhiên a, b nếu a^2 + b^2 chia hết cho 8 thì a, b không thể đồng thời là số lẻ

Chứng minh bằng phản chứng: Với các số tự nhiên a, b nếu a^2 + b^2 chia hết cho 8 thì a, b không thể đồng thời là số lẻ