Trong các phát biểu sau có bao nhiêu phát biểu là mệnh đề

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Một số câu hỏi khác cùng bài thi.

• Trong các câu sau, câu nào là mệnh đềđúng?
• Hãy liệt kê các phần tử của tập hợp:

• [1] Các phương án sau, đâu là một mệnh đề đúng?

• Với giá trị thực nào của

  mệnh đề chứa biến

  là mệnh đề đúng?

• Phát biểu nào sauđây là một mệnhđề?

• Cách phát biểu nào sau đây không thể dùng để phát biểu mệnh đề:

  .

• [DS10.C1.1.BT.a] Câu nào sau đây không phải là mệnh đề?

• Với giá trị thực nào của

  mệnh đề chứa biến

  là mệnh đề đúng?

• Mệnh đề phủ định của mệnh đề

  với mọi

  là:

• Để chứng minh định lý sau đây bằng phương pháp chứng minh phản chứng Nếu

  là số tự nhiên và

  chia hết cho 5 thì

  chia hết cho 5, một học sinh lý luận như sau: [I] Giả sử

  chia hết cho 5. [II] Như vậy

  , với

  là số nguyên. [III] Suy ra

  . Do đó

  chia hết cho 5. [IV] Vậy mệnh đề đã được chứng minh. Lập luận trên:

• Cho mệnh đề chứa biến

  chia hết cho 4 với

  là số nguyên. Xét xem các mệnh đề

  và

  đúng hay sai?

• Trong các câu sau, có bao nhiêu câu là mệnh đề:

  a. Huế là một thành phố của Việt Nam.

  b. Sông Hương chảy ngang qua thành phố Huế.

  c. Hãy trả lời câu hỏi này! d.

  .

  e.

  .

  f. Bạn có rỗi tối nay không?

  g.

  .

• Cho

  là số tự nhiên, mệnh đề nào sau đây đúng?Cho

  là số tự nhiên, mệnh đề nào sau đây đúng?

• Trong các câu sau, có bao nhiêu câu là mệnh đề?

  a] Cố lên, sắp đến rồi!

  b] Số 15 là số nguyên tố.

  c] Tổng các góc của một tam giác là

  d] 3là số nguyên dương.

• Kí hiệu nào sau đây dùng để viết đúng mệnh đề

  không phải là số hữu tỉ?

• Cho các phát biểu sau đây:

  [I]: 17 là sốnguyên tố

  [II]: Tam giác vuông có một đường trung tuyến bằng nửa cạnh huyền

  [III]: Các em C14 hãy cốgắng học tập thật tốt nhé!

  [IV]: Mọi hình chữnhật đều nội tiếp được đường tròn.

  Hỏi có bao nhiêu phát biểu là một đề?

• Cho biết

  là một phần tử của tập hợp

  , xét các mệnh đề sau:

  .

  .

  .

  . Trong các mệnh đề sau, mệnh đề nào là đúng

• Câu nào sau đây không là mệnh đề?

• Cho mệnh đề

  . Mệnh đềphủđịnh của mệnh đề

  là:

• Trong các phát biểu sau, phát biểu nào là mệnh đề đúng:

• Trong các mệnh đề sau, mệnh đề nào sai?

• Trong các mệnh đề dưới đây mệnh đề nào đúng?

• Cho

  là số thực. Mệnh đề nào sau đây đúng?

• Cho cáctậphợp

  Tìmtậphợptấtcảcácgiátrịcủathamsố

  saocho

• Cho mệnh đề chứa biến

  với

  là số thực. Mệnh đề nào sau đây là đúng:

Một số câu hỏi khác có thể bạn quan tâm.

• Phát biểu nào sau đây về dao động cưỡng bức là đúng?

• Một con lắc lò xo gồm vật có khối lượng 500g gắn với lò xo nhẹ có độ cứng 50N/m. Người ta lần lượt cưỡng bức con lắc dao động bằng các ngoại lực

  ,

  ,

  ,

  . Ngoại lực làm con lắc dao động với biên độ lớn nhất 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:

  In my experience, freshmen today are different from those I knew when I started as a counselor and professor 25 years ago. College has always been demanding both academically and socially. But students now are less mature and often not ready for the responsibility of being in college. It is really too easy to point the finger at parents who protect their children from lifes obstacles. Parents, who handle every difficulty and every other responsibility for their children from writing admission essays to picking college courses, certainly may contribute to their children's lack of coping strategies. But we can look even more broadly to the social trends of today. How many people do you know who are on medication to prevent anxiety or depression? The number of students who arrive at college already medicated for unwanted emotions has increased dramatically in the past 10 years. We, as a society, don't want to feel anything unpleasant and we certainly don't want our children to suffer. The resulting problem is that by not experiencing negative emotions, one does not learn the necessary skills to tolerate and negotiate adversity. As a psychologist, I am well aware of the fact that some individuals suffer from depression and anxiety and can benefit from treatment, but I question the growing number of medicated adolescents today. Our world is more stressful in general because of the current economic and political realities, but I dont believe that the college experience itself is more intense today than that of the past 10 years. What I do think is that many students are often not prepared to be young adults with all the responsibilities of life. What does this, mean for college faculty and staff? We are required to assist in the basic parenting of these students - the student who complains that her professor didn't remind her of the due date for an assignment that was dearly listed on the syllabus and the student who cheats on an assignment in spite of careful instructions about plagiarism. As college professors, we have to explain what it means to be an independent college student before we can even begin to teach. As parents and teachers we should expect young people to meet challenges. To encourage them in this direction, we have to step back and let them fail and pick themselves up and move forward. This approach needs to begin at an early age so that college can actually be a passage to independent adulthood.

  Question 40: Which of the following is NOT TRUE according to the passage?

• Một con lắc lò xo dao động tắt dần trên mặt phẳng nằm ngang. Cứ sau mỗi chu kì biên độ giảm 2%. Gốc thế năng tại vị trí của vật mà lò xo không biến dạng. Phần trăm cơ năng của con lắc bị mất đi trong hai dao động toàn phần liên tiếp có giá trị gần nhất với giá trị nào sau đây?

• 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:

  In my experience, freshmen today are different from those I knew when I started as a counselor and professor 25 years ago. College has always been demanding both academically and socially. But students now are less mature and often not ready for the responsibility of being in college. It is really too easy to point the finger at parents who protect their children from lifes obstacles. Parents, who handle every difficulty and every other responsibility for their children from writing admission essays to picking college courses, certainly may contribute to their children's lack of coping strategies. But we can look even more broadly to the social trends of today. How many people do you know who are on medication to prevent anxiety or depression? The number of students who arrive at college already medicated for unwanted emotions has increased dramatically in the past 10 years. We, as a society, don't want to feel anything unpleasant and we certainly don't want our children to suffer. The resulting problem is that by not experiencing negative emotions, one does not learn the necessary skills to tolerate and negotiate adversity. As a psychologist, I am well aware of the fact that some individuals suffer from depression and anxiety and can benefit from treatment, but I question the growing number of medicated adolescents today. Our world is more stressful in general because of the current economic and political realities, but I dont believe that the college experience itself is more intense today than that of the past 10 years. What I do think is that many students are often not prepared to be young adults with all the responsibilities of life. What does this, mean for college faculty and staff? We are required to assist in the basic parenting of these students - the student who complains that her professor didn't remind her of the due date for an assignment that was dearly listed on the syllabus and the student who cheats on an assignment in spite of careful instructions about plagiarism. As college professors, we have to explain what it means to be an independent college student before we can even begin to teach. As parents and teachers we should expect young people to meet challenges. To encourage them in this direction, we have to step back and let them fail and pick themselves up and move forward. This approach needs to begin at an early age so that college can actually be a passage to independent adulthood.

  Question 41: The word them in the last paragraph refers to _______.

• Một con lắc lò xo có khối lượng m dao động cưỡng bức ổn định dưới tác dụng của ngoại lực biến thiên điều hoà với tần số f. Khi f = f1 thì vật có biên độ là A1, khi f = f2 [f1 < f2 < 2f1] thì vật có biên độ là A2, biết A1 = A2. Độ cứng của lò xo 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:

  In my experience, freshmen today are different from those I knew when I started as a counselor and professor 25 years ago. College has always been demanding both academically and socially. But students now are less mature and often not ready for the responsibility of being in college. It is really too easy to point the finger at parents who protect their children from lifes obstacles. Parents, who handle every difficulty and every other responsibility for their children from writing admission essays to picking college courses, certainly may contribute to their children's lack of coping strategies. But we can look even more broadly to the social trends of today. How many people do you know who are on medication to prevent anxiety or depression? The number of students who arrive at college already medicated for unwanted emotions has increased dramatically in the past 10 years. We, as a society, don't want to feel anything unpleasant and we certainly don't want our children to suffer. The resulting problem is that by not experiencing negative emotions, one does not learn the necessary skills to tolerate and negotiate adversity. As a psychologist, I am well aware of the fact that some individuals suffer from depression and anxiety and can benefit from treatment, but I question the growing number of medicated adolescents today. Our world is more stressful in general because of the current economic and political realities, but I dont believe that the college experience itself is more intense today than that of the past 10 years. What I do think is that many students are often not prepared to be young adults with all the responsibilities of life. What does this, mean for college faculty and staff? We are required to assist in the basic parenting of these students - the student who complains that her professor didn't remind her of the due date for an assignment that was dearly listed on the syllabus and the student who cheats on an assignment in spite of careful instructions about plagiarism. As college professors, we have to explain what it means to be an independent college student before we can even begin to teach. As parents and teachers we should expect young people to meet challenges. To encourage them in this direction, we have to step back and let them fail and pick themselves up and move forward. This approach needs to begin at an early age so that college can actually be a passage to independent adulthood.

  Question 38: According to the writer, students' difficulties to cope with college life are partly due to _______.

• Sự cộng hưởng xảy ra khi:

• 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:

  In my experience, freshmen today are different from those I knew when I started as a counselor and professor 25 years ago. College has always been demanding both academically and socially. But students now are less mature and often not ready for the responsibility of being in college. It is really too easy to point the finger at parents who protect their children from lifes obstacles. Parents, who handle every difficulty and every other responsibility for their children from writing admission essays to picking college courses, certainly may contribute to their children's lack of coping strategies. But we can look even more broadly to the social trends of today. How many people do you know who are on medication to prevent anxiety or depression? The number of students who arrive at college already medicated for unwanted emotions has increased dramatically in the past 10 years. We, as a society, don't want to feel anything unpleasant and we certainly don't want our children to suffer. The resulting problem is that by not experiencing negative emotions, one does not learn the necessary skills to tolerate and negotiate adversity. As a psychologist, I am well aware of the fact that some individuals suffer from depression and anxiety and can benefit from treatment, but I question the growing number of medicated adolescents today. Our world is more stressful in general because of the current economic and political realities, but I dont believe that the college experience itself is more intense today than that of the past 10 years. What I do think is that many students are often not prepared to be young adults with all the responsibilities of life. What does this, mean for college faculty and staff? We are required to assist in the basic parenting of these students - the student who complains that her professor didn't remind her of the due date for an assignment that was dearly listed on the syllabus and the student who cheats on an assignment in spite of careful instructions about plagiarism. As college professors, we have to explain what it means to be an independent college student before we can even begin to teach. As parents and teachers we should expect young people to meet challenges. To encourage them in this direction, we have to step back and let them fail and pick themselves up and move forward. This approach needs to begin at an early age so that college can actually be a passage to independent adulthood.

  Question 39: The phrase on medication in paragraph 3 is similar in meaning to _______.

• Biên độ dao động khi có sự cộng hưởng cơ phụ thuộc vào:

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