Предмет: Математика, автор: kolyan1313

Исследовать формулу и построить ее график у=-х3-5х+3

Ответы

Автор ответа: dnepr1
0
Исследуется функция, а не формула.

Общая схема исследования и построения графика функции

 у=-х³-5х+3

1. Найти область определения функции и область значений функции, выявить точки разрыва, если они есть.

Вся числовая ось, разрывов нет.

2. Выяснить, является ли функция четной или нечетной. Ни та, ни другая.

3. Выяснить, является ли функция периодической. Нет.

4. Найти точки пересечения графика с осями координат (нули функции).

у = 0,  х = 0,56410,

х = 0,  у = 3.

5. Найти асимптоты графика. Нет.

6. Вычислить производную функции f'(x) и определить критические точки.

Производная равна -3х² - 5.

7. Найти промежутки монотонности функции. Функция убывающая на всё числовом промежутке.

8. Определить экстремумы функции f(x). Производная не может быть равна нулю(х² отрицателен), экстремумов нет.

9. Вычислить вторую производную f''(x) = -6x. x = 0.

10. Определить направление выпуклости графика и точки перегиба.

Вогнутая на промежутках (-oo, 0].
Выпуклая на промежутках [0, oo).

Перегиб в точке х = 0.

11. Построить график, используя полученные результаты исследования.

Дан в приложении.

Приложения:
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Read the text “Summer and winter sports”.


People all over the world are very fond of sports and games. That is one of the things in which people of every nationality and class are united.

The most popular outdoor winter sports are shooting, hunting, hockey and, in the countries where the weather is frosty and there is much snow — skating, skiing and tobogganing. It's so nice to go to the skating-rink on a frosty sunny day. Some people prefer to be out of town in such weather and to sledge or to ski in the woods. Many people greatly enjoy figure-skating and ski-jumping.

Summer affords excellent opportunities for swimming, boating, yachting, cycling, gliding and many other sports. Among outdoor games football takes the first place in public interests; this game is played in all the countries of the world.

The other games that have firmly established themselves in favour in different countries are cricket, volleyball, basketball , and so on. Badminton is also very popular both with young and old.

All the year round many people indulge in boxing, wrestling, gymnastics and track and field events. Scores of young girls and women go in for calisthenics. Over the last few years aerobics has become popular with young girls and women. Aerobics helps them to be slim, healthy and strong. The interest for it greatly increased thanks to Jane Fonda, a prominent American actress, the founder of this kind of sport. This woman may serve as an impressive example of inexhaustible health, cheerfulness and beauty. Being a great enthusiast of aerobics she has been trying to initiate many women all over the world into this sport.

Among indoor games which one can go in for all the year round are billiards, table tennis, draughts, chess, of course. The results of chess tournaments are studied and discussed by enthusiasts in different countries.

So we have all grounds to say that sport is one of the things that makes people kin.

Write true or false:

1. The most popular outdoor winter sports are shooting, hunting, swimming.



2. Badminton is not so popular among young and old.



3. The results of chess tournaments are never discussed by enthusiasts in different countries.
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