Предмет: Алгебра, автор: Lewies

Помогите пожалуйста решить это уравнение. x/2x-3 = 4/x

Ответы

Автор ответа: ssuper99999

$\frac{x}{2x-3}=\frac{4}{x}$
ОДЗ:
x≠0
2х-3≠0
2х≠3
х≠1.5

$x^2=8x-12$

$x^2-8x+12=0$

$D=64-48=16$

$x=\frac{8+-\sqrt{16}}{2}$

$x_1=6$

$x_2=2$

Автор ответа: OSMANOVA

---------------------------------

Приложения:

ssuper99999: ОДЗ забыл

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Українська мова, автор: angelinanimciv4

ПОМОЖІТЬ БУДЬ-ЛАСКА ❤️
ВКАЖІТЬ ЧЛЕНИ РЕЧЕННЯ У ДАНОМУ РЕЧЕННІ!!!
Перший діючий комп'ютер створив у 1944 в Гарвардському університеті професор Говард Ейкен....
пж ПОМОЖІТЬ
Наперед дякую!

1 год назад

Предмет: Английский язык, автор: hovyakovroma

1. Read article and choose the correct answer. A, B, C or D, for questions 1-4.
All About Britain’s Teenagers

School
British teenagers can leave school at sixteen after taking their GCSE exams. They study for exams in as many as ten subjects, so they have to work very hard! Today’s teens spend more time doing their homework than any teenagers in the past, studying for two and a half or three hours every evening.

Free Time
It’s not all work, of course. What do British teenagers do to have fun? They love watching TV, going out, meeting friends in Internet cafes and listening to music. Researchers found that 99% of teenagers questioned in a survey said their favourite activity was watching TV, while 98% also liked listening to music. Some teens like UK rock music, but others prefer to listen to hip-hop or nu-metal on their i-pods and mp3 players, 89% spend most of their free time online, e-mailing their mates or making new friends in their favourite social networks.

Technology
As well as the Internet, teenagers in Britain use their computers to play games and do their homework. They also love their mobile phones and spend hours texting their friends and chatting. Today, phones are getting smaller and lighter and you can do a lot more with them than just talk. Text messaging has become the coolest and trendiest way to socialize. More than 90% of 12-to 16-year-olds have a mobile and experts say that this trend stops teens from spending their cash on sweets and cigarettes. The latest craze, mobile phones with built-in video cameras, is taking the country by storm, as are digital cameras with which you can take photos that can be sent over the Internet.

Fashion
At school almost all British teenagers have to wear a school uniform. However in their free time they can wear whatever they like and what they like is designer labels. In fact, 40% of British teens say that they think it is important to have the latest designer clothes. Nike , Diesel and Paul Smith are the top favourites, but looking good doesn’t come cheap in Britain and many teenagers think nothing of spending over £100 on one item of clothing.

1. What is the writer’s main purpose in writing?
A. to describe the social life of British teenagers
B. to give statistical facts about British teenagers
C. to describe preferences and trends among British teenagers
D. to complain about teenagers in Britain
2. What would a reader learn about communication between British teenagers?
A. that technology plays an important role in it
B. that they prefect to communicate face to face
C. that in is unimportant to most of them
D. that they have difficulty in communicating
3. What does the writer suggest about British teenagers’ attitudes to technology?
A. Mobiles are their favourite items of technology.
B. They only use technology to play games and socialize.
C. They are enthusiastic about new trends in technology.
D. They see technology as cool and fashionable.
4. Which of the following best describes today’s British teenagers?
A. All they can think about is going out and having fun.
B. They spend more time playing with computers than doing their homework.
C. They don’t meet up with friends any more – they just call, text or e-mail them.
D. They seem to have more fun, but in fact they work harder than previous generations of teenagers.
5. According to the text:
A. Fashionable clothes are expensive.
B. British teens wear uniform by designer labels.
C. British young people can wear whatever they like to school.
D. Many can afford spending over £100 on one item of clothing.

1 год назад

Предмет: Математика, автор: AikaDzhan

2+2+5+6+8+9+4+3+454+78+4333+13×78×2×3:155(9×9) ПОМОГИТЕ Всем привет можете помочь

1 год назад

Предмет: Биология, автор: dimas5847

4. У якої рослини на вкорочених пагонах розміщується по одній
4-гранній колючій хвоїнці?: *
Позначте одну правильну відповідь.
a) ялини;
б) модрини;
в) ялиці.

6 лет назад

Предмет: История, автор: Аноним

Подчеркните княжества, вошедшие в состав:Великого княжества
Литовского.
Тверское, Галицко-Волынское, Черниговское, Ростовское, Нижегородское, Киевское.

6 лет назад