Найти область определения функции: у=х/2 - Znanija.Site

Найти область определения функции:
у=х/2
- Предмет:
  Математика
- Автор:
  vargas9cnf
- 4 года назад

Ответы 1

решение задания смотри на фотографии
- Автор:
  morgan41
- 4 года назад
- 0
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Нужно перевести текст и ответить на вопросы! To be a good teacher, you need some of the gifts of a good actor; you must be able to hold the attention and in¬terest of your audience; you must be a clear speaker, with a good, strong, pleasing voice which is fully under your control; and you must be able to act what you are teaching, in order to make its meaning clear. Watch a good teacher, and you will see that he does not sit motionless before his class; he stands the whole time he is teaching, he walks about, using his arms, hands and fingers to help him in his explanations, and his face to express feelings. Listen to him, and you will hear the loudness, the quality and the musical note of his voice always changing according to what he is talking about. The fact that a good teacher has some of the qualities of a good actor does not mean that he will indeed be able to act well on the stage, for there are important differences between the teachers’ work and the actor’s. The actor has to speak words which he has learned by heart; he has to repeat exactly the same words each time he plays a certain part; even his movements and the ways in which he uses his voice are usually fixed before. What he has to do is to make all these carefully learnt words and actions seem natural on the stage. A good teacher works in quite a different way. His audience takes an active part in his play; they ask and answer questions. The teacher, therefore, has to understand the needs of his audience, which is his class. He cannot learn his part by heart, but must invent it as he goes along. I have known many teachers who were fine actors in class but were unable to take part in a stage-play because their brains would not keep strictly to what another had written ...и вопросы -ответы.. Why does a good teacher need some of the gifts of a good actor? 2. Is there anything in common between the teacher*s work and the actor*s? 3. What are the difference between the actor*s work and the teacher*s? 4. Why must a good teacher be able to improvise in the course of the lesson?
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Определите валентность элементов в следующих соединениях с кислородом :
SiO2,SO2,S03.P2O3,P2O5,P4O6,P4O10
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