Cho A = { x thuộc R | -5 < x <= 3 } B = { x thuộc R | |x| < 4 } C = { x thuộc R | | x-1| >= 2 } D = { x thuộc Z | căn x^2 <= 2 } E = { x thuộc Z | 4 < x^2 < 13 } F = { x| x = 2^k phần 2k , k thuộc N*, k<= 5 } Mấy bạn cho ra dùm mình tập hợp nha

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Đáp án:

Giải thích các bước giải: A = { x thuộc R | -5 < x <= 3 }

==>A = ( -5;3]

B = { x thuộc R | |x| < 4 }

==> B = (-4;4)

C = { x thuộc R | | x-1| >= 2 }

C = ( âm vô cùng; -1] hợp [ 3; dương vô cùng)

D = { x thuộc Z | căn x^2 <= 2 }

==> D = (-2;-1;0;1;2)

$E = \{ x \in \mathbb{Z} | 2 < x < \sqrt{13} \} = \{3\}$

$F = \{ x | x = \dfrac{2^k}{2k}, k \in \mathbb{N}^*, k \leq 5 \} = \{1,4/3,2,16/5\}$.

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Mark the letter A, B, e,or D to indicate the underlined part that needs correction in each of the following questions. ( sửa lỗi luôn ạ) 51. A lot of people think that marriage women shouldn't pursue a career. A B C D 52. We must stop discrimination on people coming from the rural area. A B C D 53. My brother is good with cooking and he can cook very delicious food. A B C D 54. I guess they may be kept home doing housework and look after their chifdren, A B C D 55. Women in rural areas might be forced to work both at home but on the fields. A B C D 56. Some people think that girls shouldn't be allowed to going to university. A B C D 57. Gender discrimination should be eliminated for create equal opportunities in educationfor everyone. A B C D 58. More girls should being chosen to represent us in the School Youth Union .. A B C D 59. Both women and men should be given equal rights for education and employment. A B C D 60. This discrimination against women and girls must be abolishing. A B C D 61. Efforts should be make to offer all children equal access to education. A B C D 62. It is clear that gender differences cannot prevent a person to pursue a job. A B C D 63. Traditional women were mainly responsible to doing housework and looking after their husbands and A B C D children. 64. Doing houseworkevery day is really boring and tired. A B C D 65. In the past, women was often passive and dependent on their husbands. A B C D 66. Women usually get less pay as men for doing the same job. A B C D

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