B A C D E I y x 54 E
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Vì 0<a<b<c<d<e<f nên :
(a-b) < 0 ; (c-d) < 0 ; (e-f) < 0
và (b-a) > 0 ; (d-c) > 0 ; (f-e) > 0
Do đó (a-b)(c-d)(e-f) < 0 ; (b-a)(d-c)(f-e) > 0
Mà (a-b)(c-d)(e-f).x=(b-a)(d-c)(f-e) <=> x = -1
![](https://rs.olm.vn/images/avt/0.png?1311)
Choose the word whose underlined part is pronounced differently from the others:
51. A. worked B. naked C. looked D. attacked
52. A. engineer B. excited C. experiment D. exhibition
53. A. teammate B. speaker C. bean D. overhead
54. A. furious B. purpose C. surf D. turn
55. A. deny B. deposit C. benefit D. respond
Choose the word whose underlined part is pronounced differently from the others:
51. A. worked B. naked C. looked D. attacked
52. A. engineer B. excited C. experiment D. exhibition
53. A. teammate B. speaker C. bean D. overhead
54. A. furious B. purpose C. surf D. turn
55. A. deny B. deposit C. benefit D. respond