Предмет: Алгебра, автор: Алька16

Найти область определения функции y=все под корнем 2x^2-x+1 Спасибо)

Ответы

Автор ответа: lalisalbi

ОДЗ для функции $y=sqrt{2x^{2}-x+1}$ будет таковым:

$2x^{2}-x+1geq0$

Очевидно. что дискриминант имеет отрицальное значение (график не пересекает ось абсцисс), ветви же параболы направлены вверх, следовательно:

$2x^{2}-x+1>0$

А область определения:

$D(f)=R$

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Физика, автор: Аноним

2.Тепловая энергия перемещается в пространстве от нижней части комнаты к верхней. Как тепловая энергия передается?
А) Теплопроводностью
Б) Излучением
В) Конвекцией
Г) Конвекцией и излучением

6 лет назад

Предмет: Английский язык, автор: Kuannurasyl

A. Choose the correct option

1.
A. Where are you from?
B. What is your from?
C. What from are you?
2. Are you French?
A. Yes, I is
B. Yes he is
C. Yes I am
3.
A. He live on London
B. He live in London
C. He lives in London
4.
A. I don't like coffee
B. I doesn't like coffee
C. I does like coffee
5.
A. He goes to work in bus
B. He goes to work by bus
C. He goes to work by the bus
6.
A. George has very big car
B. George a very big car has
C. George has a very big car
7. Do you speak English?
A. Yes we do
B. Yes we don't
C. Yes they do
8.
A. Look at that house over here
B. Look at that house over there
C. Look at that house under there
9.
A. He Italian, he not Polish
B. He is Italian, he isn't Polish
C. They is Italian, they isn't Polish
10.
A. What do you have breakfast?
B. When do you have breakfast?
C. Where breakfast you?
11.
A. Where is the train station?
B. What is train station?
C. Where the train station is?
12.
A. Give me the book!
B. The book me give!
C. Give the book me!
B. Put negatives13.
A. Where did you have dinner last night?
B. Where have you had dinner last night?
C. Where do you have dinner last night?
14. I was born .....
A. before 30 years
B. thirty years ago
C. the last thirty years
15. Do you mind if I open the window?
A. Yes, that's fantastic
B. Don't be silly
C. No, not at all
16.
A. I should stop smoking
B. I should to stop smoking
C. I must to stop smoking
17. You .....
A. mustn't to go
B. don't have to go
C. needn't to go
...............if you don't want to.
18.
A. I really should to talk to her
B. I really need to talk to her
C. I really must to talk to her
19. I'm .....
A. going to take a long walk
B. going taking a long walk
C. going a long walk
20.
A. Are you going party on Friday?
B. Are you going partying on Friday?
C. Are you going to the party on Friday?
21.
A. I'm not working tomorrow
B. I'm not to working tomorrow
C. I don't working tomorrow
22.
A. Did you rather go to a different movie?
B. Would you rather go to a different movie?
C. Would you didn't go to a different movie?
23.
A. It will be very hot this summer
B. It isn't willing very hot this summer
C. It will is very hot this summer
24.
A. It was been very nice this evening
B. It has been very nice this evening
C. It will been very nice this evening.25. I haven't seen him ......
A. since yesterday.
B. for yesterday.
C. until yesterday.
26. Have you ever ......
A. gone
B. went
C. been
D. was...... to Mallorca?
27.
A. We are use to live in Paris.
B. We usually live in Paris.
C. We are using to live in Paris.
D. We used to live in Paris.
28. I wouldn't do that ......
A. if I was you.
B. if I would be you.
C. if I were you.
D. if I would you.
29.
A.They didn't see him
B. They hadn't see him
C. They can't see him
D. They weren't see him...... at the hotel, last week.
30.They are ......
A. going flying
B. fly
C. to fly
D. going to fly...... to Brazil tomorrow.
31.I have never ......
A. ate
B. eat
C. eaten
D. to eat...... Indian food.
32. Robert's from New York, .....
A. doesn't he?
B. does he?
C. is he?
D. isn't he?
33.
A. Can you speak German?
B. Could you speak German?
C. Couldn't you speak German?
D. Can't you speak German?
34.
A. You don't might
B. You don't must
C. You don't need
D. You don't should...... to collect me after the concert.      Synonyms
Choose the correct word
35. Intelligent
A. clever
B. elegant
36. Beautiful
A. stupid
B. pretty
37. Amusing
A. funny
B. boring
38. Industrious
A. hard working
B. beautiful
39. Incredible
A. not believable
B. truly
40. Generous
A. kind
B. humorous
41. Tidy
A. orderly
B. elegant

Choose the correct preposition
42. We landed ...... Dublin airport, very late.
A. in B. at
43. If we miss the flight, there isn't another ...... three hours!
A. about B. for
44. We stayed ...... a really nice hotel near the beach.
A. at B. on
45. It's not too late, so we can still have another glass ...... wine.
A. for B. of
46. This sweater is made ...... the softest wool!
A. from B. of
47. We decided to spend the weekend ...... Singapore.
A. at B. in
48. They are really looking forward ...... our visit.
A. to B. for
49. I hope you are coming to the party ...... my birthday!
A. in B. on

6 лет назад

Предмет: Математика, автор: misaenko77

325)-(6,14+3,86)-(-2,35) помогите пожалуйста

6 лет назад

Предмет: Алгебра, автор: УникУМ2000

Вчера число учеников ,присутствовавших на уроках,было в 8 раз больше числа отсутствовавших.Севодня не пришло ещё 2 человека ,и оказалось ,что отсутствующих составляет 20% от числа присутствующих.Сколько всего учеников в классе.

9 лет назад

Предмет: Алгебра, автор: Joker64

6 метров/минуту сколько это км/ч

9 лет назад