Gọi 4 số tự nhiên liên tiếp là:

\(x;x+1;x+2;x+3\)

Theo đề bài:

\(x+\left(\right.x+1\left.\right)+\left(\right.x+2\left.\right)+\left(\right.x+3\left.\right)=2642\Rightarrow\) \(4x+6=2642\Rightarrow\) \(4x=2636\Rightarrow\) \(x = 659\)

Vậy số tự nhiên nhỏ nhất là:659

Gọi số tự nhiên nhỏ nhất là \(x\).
Ba số tiếp theo lần lượt là \(x + 1\), \(x + 2\), và \(x + 3\).
Theo đề bài, tổng của 4 số này bằng 2642:
\(x+(x+1)+(x+2)+(x+3)=2642\)
\(4\times x+(1+2+3)=2642\)
\(4\times x+6=2642\)
\(4\times x=2642-6\)
\(4\times x=2636\)
\(x=2636:4\)
\(x=659\

Với hàm bậc ba \(y = a x^{3} + b x^{2} + c x + d\), hoành độ tâm đối xứng là

\(x = - \frac{b}{3 a} .\)

Ở đây \(a=1;b=-3\), nên

\(x = - \frac{- 3}{3 \cdot 1} = 1.\)

Sau đó thay vào hàm số để tìm tung độ. ✔

tk

Với hàm số y = x³ - 3x² - 1
Tâm đối xứng của đồ thị hàm bậc ba là điểm uốn
Ta có:
y' = 3x² - 6x
y'' = 6x - 6
Cho y'' = 0
6x - 6 = 0
x = 1
Thay x = 1 vào hàm số:
y = 1³ - 3.1² - 1 = -3
Vậy tâm đối xứng là I(1; -3)
Giải thích: Đồ thị hàm bậc ba nhận điểm uốn làm tâm đối xứng, nên ta tìm điểm uốn bằng cách giải y'' = 0.

The Yellow Butterfly

Yellow butterfly,
Yellow butterfly,
Flying high, flying low.
The butterfly flies to the flower,
The flower blooms beautifully.
The butterfly flies away,
Leaving the lovely flower behind.

Đúng rồi bạn

đr

cái này học theo quy tắc thôi

tôi biết nhg ko thuộc đc

1 B

2 C

3 A

1. B

2. C

3. A

- Breathing
- no i don't
- yes, i play chess.
- i haven't
- Yes
- maybe

- I don't have free time. - I don't listen to music, but I know many genres. - I don't play games, but I can help with them. - I don't have homework. - No, I don't have a pocket. - No, nothing is behind me.

My name is H

I'm fine , thank you

I like black

My best friend's name is K

- N

- not good

- pink, blue and white

- D

dựa vào động từ và ngữ cảnh của câu

câu đk hỗn hợp hơi khê

Tham khảo

My favorite job in the future is a doctor. I want to be a doctor because I like helping people. Doctors help sick people get better. They work in hospitals and help many patients every day. I think doctors are kind, friendly, and helpful. When I am sick, a doctor helps me feel better. That is why I like this job very much. I want to help people when they are sick. I want to make them smile again. Doctors are important because they help keep people healthy. They also teach people how to stay healthy and strong. I like learning about the human body and health. At school, I study many subjects. My favorite subject is Science. I think Science is fun and useful. To become a doctor, I need to study hard and listen to my teachers. I also need to read books and learn new things every day. A good doctor should be kind and patient. A doctor should also work hard and care about other people. In the future, I want to work in a big hospital. I want to help children, parents, and grandparents. I want to help people from many places. When people get better, they will be happy. Their families will be happy too. This will make me happy. I know that becoming a doctor is not easy. I need to learn for many years. However, I will not give up. I will always try my best. I believe I can make my dream come true one day. Being a doctor is my dream job because I can help many people and make the world a better place. I hope I will become a good doctor in the future and help everyone who needs my care.

Hình như để làm bác sĩ phải học giỏi biology chứ không phải science đúng không ah.