Cho hàm số  f x = x 6 − 6 x + 5 x 2 − 2 x + 1  khi  x < 1 x 2 + a x + b  khi  x ≥ 1 , trong đó a, b là các số thực thỏa mãn a 2 + a b + b 2 = 148 . Khi hàm số liên tục trên R, hãy tính giá trị của biểu thức T = a 3 + b 3 .

A. T=2072

B.T=-728

C. T=728

D.  T = ± 728

Read the passage carefully and choose the correct answer.

Improve Your Time-Managing Skills

 It is common for all of us to take more tasks than our desired potential. This can often result in stress and tiredness. Learn the art of sharing work with your partners based on their skills and abilities. Before the start of the day, make a list of tasks that need your immediate attention as unimportant tasks can consume much of your precious time. Some tasks need to be completed on that day only while other unimportant tasks could be carried forward to next day. In short, prioritize your tasks to focus on those that are more important. Carry a planner or notebook with you and list all the tasks that come to your mind. Make a simple “To Do” list before the start of the day, prioritize the tasks, and make sure that they are attainable. To better manage your time-management skills, you may think of making 3 lists: work, home, and personal. Stress often occurs when we accept more work than our ability. The result is that our body starts feeling tired which can affect our productivity. Instead, share tasks with your partners and make sure to leave some time for relaxation. Most of the successful men and women have one thing in common. They start their day early as it gives them time to sit, think, and plan their day. When you get up early, you are more calm, creative, and clear-headed. As the day progresses, your energy levels start going down, which affects your productivity and your performance as well.

The word “attainable” in paragraph 3 is closet in meaning to “_______”.

A. being able to attend

B. possible to achieve

C. impossible to achieve

D. succeeding in managing something

Với a,b > 0 bất kì. Cho biểu thức a 2 3 b + b 2 3 a a 6 + b 6 . Tìm mệnh đề đúng

A. P =  a b

B. P =  a b 3

C. P =  a b 6

D. P = ab

Mệnh đề nào sau đây đúng?

A.  ∀ x ∈ ℝ , x ≥ − 3 ⇒ x 2 > 9

B.  ∀ x ∈ ℝ , x > 3 ⇒ x 2 > 9

C.  ∀ x ∈ ℝ , x 2 > 9 ⇒ x > 3

D.  ∀ x ∈ ℝ , x 2 > 9 ⇒ x > − 3

Chọn dấu thích hợp để điền vào chỗ trống :

43756 ..... 34825

Read the following passage and answer the questions.

Once upon a time there was a young girl called Cinderella. Cinderella was living happily with her family when her mother died. Her father married an evil widow with two daughters. Cinderella’s stepmother and two stepsisters mistreated her. She had to wear old clothes and work hard while the sisters wore fancy clothes and had fun. A good witch helped Cinderella. She turned Cinderella’s old dress into a beautiful gown. Cinderella went to a party and a handsome prince politely invited her to dance with him. He fell in love with her and wanted to find out who she was. Cinderella left the party in a hurry and didn’t tell the prince her name. but she left a glass slipper, and the prince used that to find her. They got married and lived happily ever after.

Did a good witch help Cinderella?

……………………………………………………………….………………………

Trong sản xuất và lưu thông hàng hóa phải dựa vào yếu tố nào?

A. Thời gian.

B. Thời gian lao động.

C. Thời gian lao động cá biệt.

D. Thời gian lao động xã hội cần thiết.

Trong không gian Oxyz, cho hai điểm A(3;2;1), M(3;0;0) và mặt phẳng (P) có phương trình là: x + y + z - 3 = 0. Viết phương trình của đường thẳng d đi qua điểm M, nằm trong mặt phẳng (P) sao cho khoảng cách từ A đến đường thẳng d nhỏ nhất

A. x = -3 - t, y = t, z = 0

B. x = 3 + t, y = 2t, z = 2t

C. x = 3 - t, y = t, z = 0

D. Đáp án khác