Предмет: Алгебра, автор: anutkakawaii

Найдите, при каких значениях параметра a уравнение (15sinx - a - 5)*(15sinx + 2a - 5) = 0 имеет ровно два решения на промежутке {0; 2∏).

Ответы

Автор ответа: Елизавет15

0

о формуле корней через дискриминант ищи этот дискриминант
причем а=а-1
в=-2а
с=-а
в формулу подставляй и
1)приравнивай полученное выражение к2 получаешь отвеит на первый вопрос
2)решаешь неравенство дискриминант больше0
3)приравниваешь дискриминант к 0
4)решаешь неравенство дискриминант меньше о

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: osimkovlad65

I. Исправьте ошибки в использовании артиклей. Перепишите и переведите предложения на русский язык. 1)The Moscow is the capital of Russia. 2) I like tea with a sugar. 3) My cousin has a three English books. 4) The Peter Parker is a hero of the film «Spiderman». 5) Her little brother has a very good imagination. 6) What is your a name? 7) The computer is a very good thing for students. 8) A children like to play with cats and dogs. 9) Our the family likes to visit many countries. The we live in an Australia, but every year we go to the Great Britain, USA, New Zealand.

6 лет назад

Предмет: Английский язык, автор: erikerikerik234

СРОЧНО ПОМАГИТЕ ПЖ

Помагите пожалуйста с англиским

1.Complete the sentences with one of the following words.

Designer

Mechanic

translator

cook

1. Jane can bake very tasty cakes. She is an excellent _____________

2. Fred can fix your car. He is a skillful _____________

3. Lucy can help you with your text. She is a good _____________

4. Sam can help you decorate the room. He is an excellent _________

5. Mr Black can cure you. He is a good _____________

2.Complete the sentences using the right words.

1. I'm afraid I can't help you now, but I think that tomorrow I _________

A.can B.shall be able to C.shall be allowed to D.may

2. Last week I was absent from Math lessons. I __________ work hard.

A.may B.will be able to C.could D.had to

3. Victor was hurt but he _____________ help me back on board.

A.will be able to B.can C.Was able to D.was allowed to

4. Today the weather is _____________ than yesterday.

A.Worse B.Bad C.the worst D.the best

5. Cardiff is the _____________ city in Wales.

A.largest B.the larger C.the large D.larger

3. Fill in the gaps using the right form of the words given below.

Head, people, large, to have, to include

The United Kingdom is a 1._________ island located in Europe. It also

2._________ part of the island of Ireland. Over 60 million 3._________

live in the United Kingdom. A constitutional monarchy is a government

in which the monarch (king or queen) is the 4._________ of the state. Queen Elizabeth Il is the monarch of the United Kingdom. In reality,

however, she 5._________ very little political power.

4. Use the correct from of the adverbs in brackets.

1. Jane dances _________ (Beautifully) than her sister

2. Sam works _________ (Hard) than his younger brother.

3. You are driving _________ (fast) than needed. Please slow down.

4. Yesterday he came home _________ (late) than usual.

5 Linda speak Spanish _________ (well) than her elder sister.

6 лет назад

Предмет: Русский язык, автор: sofiaostroglad

Умоляю помогите сделать!Даю 30

6 лет назад

Предмет: Химия, автор: Петююня

c7h14 напишите пожалуйста изомеры по структуре углеродного скелета

9 лет назад

Предмет: Геометрия, автор: TYguys

Известно, что 0 < a < 1. Сравните a и a^3

1) a=a^3

2) a>a^3

3) a<a^3

4) сравнить нельзя

9 лет назад