СПРОЧНО ВЫБЕРИТЕ Подходящие ПО СМЫСЛУ ВАРИАНТ:
I. Amy was doing her homework while Mike (was cooking, cooks, is cooking)
2. I like (adventure, drama, science-fiction) because they usually take place in space:
3. They (are taking, take, taking) the dog for a walk every morning
4. My friends were writing un essay when I (was walking, walk. walked) in the class
5. Documentaries are very (interest. interesting, interested)
6. They (walked, were walking, walk) when it started to snow
7. The boy (that, which, whose) lives here is Mike s sister.
8. Did you (give back. give up, give out) the pen? It belongs to the teacher. 9 The book (who, why, which) you are reading is very interesting
10. She (prepares, is preparing, was preparing) lunch at the moment. F! The skirt goes really well (on, with, off) your tie. [2 He (didn't, doesn't, don't) to pay bills last year,
2. Read the letter and fill in (ВСТАВЬТЕ ПРОПУСКИ В ТЕКСТ): I'm better than about should Dear Annie, Thank you for writing to me about your problem. I was sorry to hear that you ure unhappy at your new school because you don't know anyone there. I have some advice on how to make new friends. The first thing I) is try to become part of the new school. For example, 2) joining the drama club? This way, you show you really want to be a part of things.
3)
is to invite a few of your classmates to study with
studying alone and, by doing this, you will get to know people better I hope you find my advice useful. Don't forget, it's up to you to make things happen. 5) how things go. I think that you will soon have lots of new friends Best wishes, Pania
ответ:
do a sport called hand-to-hand combat. i go to classes 4 times a week: tuesday, thursday, saturday and sunday. it's the same as the gym, only here you get more power. i want to advise people to go to classes, eat more vitamins, and not sit at home at the computer
перевод на :
я занимаюсь спортом под названием "рукопашный бой". на занятия я хожу 4 раза в неделю: вторник, четверг, суббота и воскресенье. это тоже самое, что и тренажёрный зал, только здесь ты получаешь больше силы. людям я хочу посоветовать ходить на занятия, есть больше витаминов, а не сидеть дома за компьютером
получается делаем так:
сначала решаем уравнение как и обычно т.е. теоремой виетта или дискриминантом
х^2-4х+3=0
я решу теоремой виетта:
сумма корней равна 4
произведение 3
значит корни 1 и 3
далее:
есть такая формула разложение на множетели квадратного уравнения выглядит так: a(x-x1)(x-x2), где а-множетель перед квадратом в нашем случае это 1, х1 и х2 - корни.
подставим в неё наши корни, получим (x-1)(x-3)=0
так а теперь решим это неравенство (x-1)(x-3)> 0
методом интегралов ( тут 3 промежутка от минус бесконечности до 1 от 1 до 3 и от 3 до плюс бесконечности):
допустим х =0, подставим (0-1)(0-3)=3 знак + значит в промежутке от минус бесконечности до 1 знак +
от 1 до 3 знак -
от 3 до плюс бесконечности +
ответ: х принадлежит промежутку от минус бесконечности до 1 и от 3 до плюс бесконечности