Đáp án+Giải thích các bước giải:
`(x-23)/24+(x-23)/25=(x-23)/26+(x-23)/27`
`<=>(x-23)/24+(x-23)/25-(x-23)/26-(x-23)/27=0`
`<=>(x-23)(1/24+1/25-1/26-1/27)=0`
Vì `1/24+1/25-1/26-1/27 ne 0`
`<=>x-23=0`
`<=>x=23`
Vậy `S={23}.`
`b)(x+2)/98+1+(x+3)/97+1=(x+4)/96+(x+5)/95+1`
`<=>(x+100)/98+(x+100)/97=(x+100)/96+(x+100)/95`
`<=>(x+100)(1/98+1/97-1/96-1/95)=0`
Vì `1/98+1/97-1/96-1/95 ne 0`
`<=>x+100=0`
`<=>x=-100`
Vậy `S={-100}.`
Giải thích các bước giải:
\(\begin{array}{l}a.\frac{{x - 23}}{{24}} + \frac{{x - 23}}{{25}} = \frac{{x - 23}}{{26}} + \frac{{x - 23}}{{27}}\\ \to \frac{{x - 23}}{{24}} + \frac{{x - 23}}{{25}} - \frac{{x - 23}}{{26}} - \frac{{x - 23}}{{27}} = 0\\ \to \left( {x - 23} \right)\left( {\frac{1}{{24}} + \frac{1}{{25}} - \frac{1}{{26}} - \frac{1}{{27}}} \right) = 0\\ \to x - 23 = 0\\ \to x = 23\\b.\frac{{x + 2}}{{98}} + 1 + \frac{{x + 3}}{{97}} + 1 = \frac{{x + 4}}{{96}} + 1 + \frac{{x + 5}}{{95}} + 1\\ \to \frac{{x + 100}}{{98}} + \frac{{x + 100}}{{97}} - \frac{{x + 100}}{{96}} - \frac{{x + 100}}{{95}} = 0\\ \to \left( {x + 100} \right)\left( {\frac{1}{{98}} + \frac{1}{{97}} - \frac{1}{{96}} - \frac{1}{{95}}} \right) = 0\\ \to x + 100 = 0\\ \to x = - 100\end{array}\)
Cho mình hỏi các bài trong hình với
A=1.50+ 2.49+ 3.48 ....+ 49.2+ 50.1 Tính A
Vẽ anime có 4 người trong hình mà là 2 cặp đôi Cố lên!!!~~😂😂
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. As soon as the spacecraft ___________ into space, the crew started to observe the sun. A: was travelling B: had travelled C: travelled D: has travelled
Cho câu chủ đề: "Văn chương gây cho ta tình cảm ta không có ,luyện những tình cảm ta sẵn có; cuộc đời phù phiếm và chật hẹp của cá nhân vì văn chương mà trở nên thâm trầm và rộng rãi đến trăm nghìn lần".Hãy viết đoạn văn (từ 10 đến 12 câu ,có sử dụng trạng ngữ ,nêu ý nghĩa của trạng ngữ em vừa sử dụng) giải thích và chứng minh cho ý trên
1 .Marta is …….. France. She’s French. a. in b. at c. from d. to 2 I never meet ……… interesting people nowadays. a. some b. any c. a d. the 3 She’s small …….. beautiful. a. and b. but c. so d. also 4 Steve is the smartest ….. our math class. a. on b. in c. of d. for 5 Who …….. to your party next week? a. are you coming b. is he coming c. is coming d. are coming 6 Who …… the tickets? a. buy b. buys c. is buying d. are buying 7 …….. do you usually go out with? a. Who b. What c. When d. Where 8 “…… house is it?” –“It’s Susan’s”. a. Who b. Who’s c. Whose d. Which 9 Spring is my favorite…… a. season b. weather c. sport d. activity 10 Sarah is ….. than Marta. a. more friends b. friendly c. friendlier d. more friendly 11 “Are you older than your brother?” – “…….” a. Yes, he’s older b. No, I’m older c. Yes, he’s younger d. None is correct 12 Many people think that Venice is … city in the world. a. the beautiful b. more beautiful c. very beautiful d. the most beautiful 13 “What are you watching?” –“……” a. That’s beautiful b. Not really c. A French movie d. Very tired 14 Is she studying a lot these days? a. No, not today. b. No, she’s eating dinner. c. Yes, she is. d. Yes, she’s sad. 15 “Does July often take the bus?”—“Yes,……..” a. she always does b. she rarely does c. she never does d. she ever does 16 ………… visit her family? a. John sometimes b. Is John sometimes visiting c. Does John sometimes d. Sometimes John 17 “……………..?” --- “Every day” a. What kind of junk food do you eat b. Who eat junk food c. How often do you eat junk food d. Why do you eat junk food 18 “I don’t have to work today”. – “……..” a. Why don’t we to go out somewhere? b. Let’s going out somewhere. c. What about go out anywhere? d. How about going out somewhere? 19 “Which sport do you like best?” –“ ………..” a. I think soccer is very exciting b. I don’t enjoy playing table tennis c. Skiing is very dangerous d. I never play tennis 20 Andrew is taller than Martin. a. Andrew is very tall. b. Martin isn’t as tall as Andrew. c. Martin is a little shorter than Andrew. D. b & c are correct.
Giúp với mik cần gấp lắm. Bài 101 :((
Giúp mik với ạ mik đag cần gấp hứa sẽ vote 5 sao
Bài 2 Phần Địa Lý Vùng trung du Bắc Bộ
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. Christer Fuglesang said he enjoyed floating around in the____environment. A: weightless B: homesick C: quiet D: heavy
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