Tính tích tất cả các nghiệm của phương trình \(4 \cdot \,3{\,^{\log \left( {100{x^2}} \right)}} + 9 \cdot {4^{\log \left( {10x} \right)}} = 13 \cdot \,{6^{1 + \log x}}\).

Một con lắc đơn gồm vật nặng có khối lượng 200 g, dây treo có chiều dài 100 cm. Kéo vật khỏi vị trí cân bằng góc 60^o rồi buông không vận tốc đầu. Lấy g = 10 m/s². Cơ năng của con lắc là

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34. Foot-racing is a popular activity in the United States. It is seen not only as a competitive sport but also as a way to exercise, to enjoy the camaraderie of like-minded people, and to donate money to a good cause. Though serious runners may spend months training to compete, other runners and walkers might not train at all. Those not competing to win might run in an effort to beat their own time or simply to enjoy the fun and exercise. People of all ages, from those of less than one year (who may be pushed in strollers) to those in their eighties, enter into this sport. The races are held on city streets, on college campuses, through parks, and in suburban areas, and they are commonly 5 to 10 kilometers in length. The largest footrace in the world is the 12-kilometer Bay to Breakers race that is held in San Francisco every spring. This race begins on the east side of the city near San Francisco Bay and ends on the west side at the Pacific Ocean. There may be 80,000 or more people running in this race through the streets and hills of San Francisco. In the front are the serious runners who compete to win and who might finish in as little as 34 minutes. Behind them are the thousands who take several hours to finish. In the back of the race are those who dress in costumes and come just for fun. One year there was a group of men who dressed like Elvis Presley, and another group consisted of firefighters who were tied together in a long line and who were carrying a fire-hose. There was even a bridal party, in which the bride was dressed in a long white gown and the groom wore a tuxedo. The bride and groom threw flowers to bystanders, and they were actually married at some point along the route.

Which of the following is NOT mentioned in this passage?

Pha sáng của quang hợp diễn ra ở đâu?

Đâu là tác nhân sinh học gây ra đột biến gen?

Nội dung nào sau đây không phải ưu điểm của cơ chế thị trường?

Tính đạo hàm của hàm số \(f(x)=x(x-1)(x-2) \cdots(x-2024)\) tại điểm \(x=0\)?

Khi nói về quá trình trao đổi khí ở chim, các phát biểu dưới đây là đúng hay sai?

Dao động âm có tần số $f$ = 500 Hz , biên độ $A$ = 0,25 mm, được truyền trong không khí với bước sóng $\lambda$ = 70 cm. Vận tốc truyền sóng âm và vận tốc dao động cực đại của các phần tử môi trường lần lượt là

Read the passage carefully. Choose an option (A, B, C, or D) that best answers each question from 41 to 45.

1. It is estimated that about 40 per cent of the world's population use social media, and many of these billions of social media users look up to influencers to help them decide what to buy and what trends to follow. An influencer is a person who can influence the decisions of his or her followers because of his or her knowledge or special knowledge in a particular area, e.g. fashion, travel, or technology. Influencers are now seen by many companies as a direct way to customers' hearts. Brands are now asking powerful influencers to market their products. With some influencers charging up to $25,000 for one social media post, it is no surprise that more and more people are keen to become influencers, too. If you are one of them, then here are five tips on how to do it.

2. Choose your niche: What is the area that you know most about? What do you feel most excited talking about? Find the specific area that you are most interested in and develop it.

3. Choose your medium and write an interesting bio: Most influencers these days are bloggers and micro-bloggers. Decide which medium – such as your own online blog, Instagram or Snapchat – is the best way to connect with your followers and chat about your niche area. When you have done that, write an attention-grabbing bio that describes you and your speciality area in an interesting and unique way. Make sure that people who read your bio will want to follow you.

4. Post regularly and consistently: Many influencers post daily on their social media accounts. The more you post, the more likely people will follow you. Also, make sure that your posts are consistent and possibly follow a theme.

5. Tell an interesting story: Whether it is a photo or a comment that you are posting, use it to tell a story that will catch the attention of your followers and help them connectwith you.

6. Make sure people can easily find your content: Publicize your posts on a variety of social media by hashtags and catchy titles to make sure that they can be easily found. There is no point writing the most exciting blogposts or posting the most attractive photographs if no one is going to see them.

7. Most importantly, if you want to become a social media influencer, you need to have patience. Keep posting and your following will gradually increase. Good luck!

In paragraph 2, what is the word niche closest in meaning to?

Cho tứ diện $ABCD$. Mệnh đề nào dưới đây đúng?

Một người đi xe máy từ nhà đến bến xe bus cách nhà 3 km về phía Tây. Đến bến xe, người đó lên xe bus đi tiếp 15 km về phía Nam. Quãng đường người đó đã đi và độ lớn độ dịch chuyển tổng hợp của người đó lần lượt là

Mệnh đề phủ định của "nếu $xy = 0$ thì $x = 0$ hoặc $y = 0$" là

Dựa vào bản đồ dưới đây (Atlat Địa lí Việt Nam, Nxb Giáo dục Việt Nam, 2024) và kiến thức đã học, trả lời các câu hỏi dưới đây.

Vùng khí hậu nào sau đây có mưa nhiều vào mùa thu – đông?

Cho tập $A=\Big\{ x \in \mathbb{Z} \, \big| \, -1< x \le 2 \Big\}$. Mệnh đề nào sau đây đúng?

Xác định ý đúng: Đặc điểm nào không đúng với vai trò của nội thương?