Выражение 2а+ b=2b+a — верно при любых a и b это ложное высказывание? - Znanija.Site

Выражение 2а+ b=2b+a — верно при любых a и b это ложное высказывание?
- Предмет:
  Математика
- Автор:
  tux
- 1 год назад

Ответы 1

Ответ:
Нет, это не ложное высказывание
2a+ b=2b+a\\2a-a=2b-b\\a=b
- Автор:
  jonas410
- 1 год назад
- 1
Добавить свой ответ

Еще вопросы

если (x^2+1)(y^2+1)+9=6(x+y) тогда x^2+y^2=?
- Предмет:
  Алгебра
- Автор:
  carlo
- 1 год назад
- Ответов:
  
  1
- Смотреть
Не существует натуральных чисел, оканчивающихся на 0
- Предмет:
  Математика
- Автор:
  adams
- 1 год назад
- Ответов:
  
  1
- Смотреть
Помогите русский экзамен
- Предмет:
  Обществознание
- Автор:
  tyrellee4w
- 1 год назад
- Ответов:
  
  1
- Смотреть
Помогите пж 45баллов Reading 9 Read the extracts from articles written by travel writers. Match the extracts with each sentence. There is one extract that matches two sentences. art 1_ Elizabeth seemed like an ordinary person - just another old lady sitting on the deck of a cruise ship. I wouldn't have started talking to her if I hadn't noticed that everyone on the ship knew her name: from the captain to the cleaners. Elizabeth told me that she'd moved into a cabin on the cruise ship nine years earlier, and had never left. Elizabeth pays £4,000 a month to stay on the ship - about the same as a hotel room on land. But the ship has great food and entertainment, and Elizabeth sees the world! 2 It was 3 a.m., and I just wanted to sleep. But the people cleaning the departure lounge had other ideas. You can't stay here. You have to move!" I wanted to say, "Look, if a hurricane hadn't hit Cuba, they wouldn't have cancelled my flight - and I wouldn't be trying to sleep on your floor. Does it look like I'm having fun?' But, of course, I just picked up my things, walking back to the all-night airport café. It was my third cup of coffee that night, and I wasn't feeling very good. 'If anyone else tells me to move,' I thought, I'll scream!" 3 I was sitting on a flight to São Paulo, enjoying a film, when someone cried, 'Look! The engine's caught fire!' Moments later, the captain made an announcement. 'Ladies and gentlemen, both our engines have stopped. We're trying to start them, so please stay calm.' Calm - we were falling out of the sky! People began to scream. The cabin crew rushed around. I cried! Then suddenly, the left engine came back to life. 'Ladies and gentlemen,' the captain announced, sounding happier this time, 'we're going to land in Senegal, West Africa. I hear it's nice at this time of year." 4 — On our first day in New York, we went for a walk through Central Park, sitting on a bench to eat hotdogs. Then we left the park, planning to go to the Empire State Building. We were walking down Fifth Avenue, enjoying the sunny weather, when my Mum suddenly cried, 'Oh no. I've left our bag in the park.' 'My camera is in that bag!' Megan said. It wouldn't have happened if you'd been more careful,' Dad said. But I just said, 'Let's stop blaming Mum and go back to the park.' And luckily someone had found our bag and hidden it behind the bench, thinking we might come back for it. In this article, the writer A is told to do something that they don't want to do. B nearly loses something important on the first day of a holiday. C is very frightened by something that he/she hears. D meets a person who has an unusual life. E suggests doing something about a problem. BadhW Mark: 15 G
- Предмет:
  Английский язык
- Автор:
  jairashley
- 1 год назад
- Ответов:
  
  1
- Смотреть

How much to ban the user?

1 hour 1 day 100 years