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при каких значениях а верно а в квадрате меньше а? .Пожалуйста по подробнее.
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Предмет:
Математика -
Автор:
mikeellison - 5 лет назад
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Ответы 1
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a^{2} <aa^{2} -a<0a(a-1)<0a1=0 a2=1 на координатной прямой отмечаем эти точки и рис змейку со знаками + - +. Нас устраивает промежуток (0,2)
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Автор:
kamoraajm9 - 2 года назад
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14
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Еще вопросы
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CONTINUOUS TENSES (ACTIVE VOICE)
1. Write the sentences in negative and interrogative forms.
1) Listen! Someone is knocking at the door.
2) Yesterday from 5 till 7 o'clock I was revising the material for my
English exam.
3) Don't go in the lecture-hall. The students are writing a test there.
4) if it is raining we shall not go out
5) Don't worry. They will be waiting for you at the railway station as
soon as you arrive.
2. Use the correct form of the verbs in brackets.
1) What you (do) here? -I (to wait) for a friend.
2) Let's go for a walk, it (not, to rain).
3) He (to have) a shower when the phone rang.
4) I (to wait) for you at five o'clock tomorrow.
5) She (to return) from the library at six o'clock.
6) What you (to do) at eight o'clock? - I (to work) on my report.
7) I don't know the man, who (to speak) to you for such a long time.
3. Put the questions to the underlined words.()
1) I was reading an( English novel) at five o'clock yesterday.
2) My friends and I were spending our holidays (in a boat on the
river.)
3) At this time tomorrow you'll be sailing down the Moscow-river.
4) They are busy now. (They) are discussing an important question.
5) Listen! (The telephone )is ringing.
6) The engineer Petrov was having (dinner) at half past three
yesterday.
7) They will be solving a( very serious problem) at this time the day
after tomorrow.
1. Write the sentences in negative and interrogative forms.
1) He is waiting here for his friend.
2) They are short of time. They are hurrying to the railway station.
3) She will be waiting for you at seven o'clock in the evening.
4) We were packing our things for the departure, when you came.
5) When her parents entered the room Kate was looking around her
new room with great interest.
2. Use the correct form of the verbs in brackets.
1 .We (to wait) for Dr. Brown at eight o'clock yesterday.
2. Where is Petrov? - He (to work) over the experiment.
3. When they opened the door, he (to look) somewhere with great
surprise.
4. I'll be late for my work tomorrow as I (to work) over my report in the
library.
5.The little boy (to eat) his ice-cream. How funny it is.
6.Thеу (to play) chess with their friends in that room.
7.At this time tomorrow I (to fly) to London.
3. Put the questions to the underlined words.
1) He will be meeting you (at the hall.)
2) Ann is packing her things( for her departure.)
3) My sister (was paving) for her new coat when I came into the shop.
4) When he was hurrying( to the railway station), he suddenly realized
he had forgotten his ticket.
5) They will be having (dinner) when you come to see them.
6) He is leaving to( Saint-Petersburg) in the morning.
7) She will be returning from the library (at six in the evening.)
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