геометрическая прогрессия (bn) задана условиями: b1 = -1 , bn+1=2bn. Найдите b7 - №23938691

геометрическая прогрессия (bn) задана условиями:
b1 = -1 , bn+1=2bn. Найдите b7
- Предмет:
  Математика
- Автор:
  reginaldwall
- 5 лет назад

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GRAMMAR TEST
1. ВЫБЕРИТЕ ПРАВИЛЬНЫЙ ВАРИАНТ ОТВЕТА.

1. Perhaps in the future men ____ on the sea, away from the crowded and noisy cities on land.
A. will live B. would live C. are living D. live
2. ____ you ____ get up early yesterday to meet the delegation at the airport?
A. Did; have to B. Had; to C. Have; had to D. Did; to
3. This time tomorrow you ____ sitting in a deck chair on the beach.
A. are B. were C. will D. will be

4. He refused to go until he ____ seen all the paintings.
A. had B. was C. is D. has

5. Sometimes I wonder if I ____ ever succeed.
A. do B. shall C. am D. were

6. I ____ studying when my rude neighbors interrupted me with their loud music.
A. be B. was C. am D. been

7. Last year, Mrs. Simon volunteered at the local hospital. She used to ____ treats for the patients on Mondays.
A. brought B. bring C. brings D. been

8. Currently, Brady ____ every morning. He's in really good shape and he's very dedicated.
A. swam B. swim C. swims D. to swim

9. My daughter _____ since early morning. Tomorrow she will have a test so don’t bother her!
A. have been studies B. have been studies
C. have studied D. has been studying

10. Have you already ____ you future career? – Yes I ____ to be an attorney.
A. chosened; choosed B. choosed; choosed
C. chosen; chose D. chose; chosen
11. The two ropes were ____ together, so it was difficult to get them apart.
A. bind B. bound C. binds D. to bind

12. When we arrived at the airport, we found that the flight ____.
A. had been cancelled B. is being cancelled
C. has been cancelled D. has cancelled

13. The floors in the office ____ every day.
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C. were being swept D. sweep

14. I think the money ____ back in the nearest future.
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15. Is she _____ (всегда) in time for dinner? – No, she is (никогда) in time for dinner.
A. always; never B. often; frequently
C. occasionally; seldom D. rarely; almost

16. He looked at me _____ (подозрительно) and said that I spoke French _____ (хорошо). He must have guessed that I was a French spy.
A. suspiciously; good B. suspicious; well
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17. Tell us _____ (несколько) words about your studies.
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18. Is there _____ bread on the plate?
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19. My teachers always expected me _____ well in exams.
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24. This dress looks so old and worn out. It seems _____ ages ago.
A. to have been made B. to be made C. to make D. made

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