(x + 2) . (x - 9) = 0

=> x + 2 = 0 hoặc x - 9 = 0

=> x = 0 - 2 hoặc x = 0 + 9

=> x = -2 hoặc x = 9

Vậy x \(\in\){-2; 9}.

Tìm tập xác định của hàm số y = 1 − 2 x 1 3 .

A. D = 0 ; + ∞ .

B.  D = − ∞ ; 1 2 .

C.  D = − ∞ ; 1 2

D.  D = ℝ

Cho 4,48 lít CO 2  vào 150 ml dung dịch Ca ( OH ) 2  1M, cô cạn hỗn hợp các chất sau phản ứng ta thu được chất rắn có khối lượng là

A. 18,1 gam.

B. 15 gam.

C. 8,4 gam.

D. 20 gam.

Dung dịch nào sau đây không dẫn điện?

A. Dung dịch NaCl trong nước

B. Dung dịch C 2 H 5 OH trong nước

C. Dung dịch KCl trong nước.

D. Dung dịch H 2 SO 4  trong nước.

Viết số thích hợp vào chỗ chấm:

7 ; 14 ; 21 ; ……   ; ……  ; ….…  ; …… ;

Để m gam bột Fe ngoài không khí sau một thời gian thu hỗn hợp X gồm Fe và 3 oxit trong đó m_Fe2O3 : m_FeO = 20:9 . Để hòa tan hoàn toàn hỗn hợp X cần 100ml dung dịch HCl 1M và có 0,224 lít khí thoát ra (dktc). tính m

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the word or phrase that best fits each of the numbered blanks.

You will make the interview process easier for the employer if you prepare relevant information about yourself. Think about how you want to present your (3)______, experiences, education, work style, skills, and goals. Be prepared to supplement all your answers with examples that support the statements you make. It is also a good idea to review your resume with a critical eye and identify areas that an employer might see as limitations or want further information. Think about how you can answer difficult' questions (4)______ and positively, while keeping each answer brief.

An interview gives the employer a (5)_______ to get to know you. While you do want to market yourself to the employer, answer each question with an honest response.

Never say anything negative about past experiences, employers, or courses and professors. Always think of something positive about an experience and talk about that. You should also be (6)______. If you are genuinely interested in the job, let the interviewer know that. One of the best ways to show you are keen on a job is to demonstrate that you have researched the organization prior to the interview. You can also (7)________ interest by asking questions about the job, the organization, and its services and products.

Question 3:

A. pressures

B. practises

C. promotions

D. strengths