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у'=-2/3 *3х²+8=-2х²+8у'=0-2х²+8=0-2(х²-4)=0 разделим на -2х²-4=0(х-2)(х+2)=0х1=2, х2=-2 точки экстремума
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Автор:
skipfritz - 6 лет назад
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Перепишите предложения, выбрав правильный вариант.
1. She read the letter … it to pieces.
a) tore b) torn c) teared d) has teared
2. I have got … money than I had last year.
a) most b) fewer c) least d) less
3. Robert … in Kenya a few years ago.
a) has arrived b) arrived c) had arrived d) is arriving
4. I don’t think he actually had … me about his problem.
a) to talk b) to tell c) telling d) to be told
5. Dick is … than both Tom and Adam.
a) more fat b) fatter c) the fattest d) as fat
6. You are lucky … alive after being in that accident.
a) to be b) being c) were d) had been
7. While I … to the concert somebody knocked at my door.
a) listen b) was listening c) was listen d) have been listening
8. I am going to retire next month and I’m looking forward to … quiet life after the pressure I … under for so many years.
a) having a , have been b) have, had been c) have, was d) having a, had been
9. The situation is becoming … . The main thing to do now is getting … as soon as possible.
a) threatening, on b) threatened, out c) threatened, through d) threatening, away
10. Bob is the … of the two brothers. But his younger brother is … taller than he is.
a) oldest, much more b) eldest, more c) elder, much d) older, more much
11. It was a chance … , so we made a list of things ….
a) not miss, be taken b) not to be missed, to be taken
c) of not missing, being taken d) of not missed, to be taken
12. He is afraid … to Mrs. Priestly. In his place I would rather … her. He may depend on her … the problem properly.
a) of speaking, trusting, understanding b) to speak, trust, understanding
c) of speaking, to trust, understanding d) to speak, to trust, to understand
13. The train … just as he … the station.
a) came, reached b) had come, had reached
c) came, had reached d) has come, reached
14. You are a fool … all his stories. He has made them all … .
a) to listen, out b) to hear, on c) to listen to, up d) to listen on, off
15. I always regretted … Egypt. I can’t help … its ancient civilization.
a) not visiting, admiring b) do not visit, admire
c) not to visit, to admire d) not having visited, to have admired
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