Bài 3: Tìm số phần tử của tập hợp: c) C = {1; 5; 9; 13; ...; 49} a) A = {0; 1; 2; 3; 4; ..; 100} d) D = {1; 3; 5; 7; ..; 197}. b) B = {0; 2; 4; 6; ....; 250 } Mn ơi giúp em bài 3 với ạ

Các câu hỏi liên quan

Lisa and Trish are students. They’re talking about what to do after university. Write sentences using the words given. (2) If you / find / a job using your languages / you / take it? ........................................................................................ Lisa: (3) If it / be / in South America / I / certainly / consider it carefully. I’ve always wanted to go there. .......................................................................................................... I’ve always wanted to go there. Trish: What about working as a tour guide, taking tourists round? (4) That / be / a great way to travel if you / speak the right languages. ...................................................................................................................... Lisa: But (5) I / only / consider / a job like that if I / be / sure the travel company was a good one. ..................................................................................................................... (6) If the tourists / not / like / their hotels and so on, I / have a terrible time. .......................................................................................................................... Trish: Yes. (7) You / be / handling complaints every day if they / not / be / happy. ......................................................................................................................................... Lisa: Exactly! (8) But if I / decide / to apply for a job like that, / you / help me with my application? .................................................................................................................................................. Trish: Of course. And, I’m sure (9) you / succeed, if you / do. ............................................................................................................................ Lisa: Thanks very much.