Предмет: Алгебра, автор: bmvmaks500

(X2-1)×(1/x-1-1/x+1-1) помогите x2 это степень 2 пжалуста

Ответы

Автор ответа: skvrttt

(x² — 1) × (x⁻¹ — 1 — x⁻¹ + 1 — 1) = (x² — 1) × ( $frac{1}{x}$ — $frac{1}{x}$ — 1 + 1 — 1) = (x² — 1) × (—1) = —x² + 1 = 1² — x² = (1 — x)(1 + x)

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Английский язык, автор: kmariya666

Choose the necessary word and insert it into the sentence: obtain, maintain, contain. 1. Excess fat stored in the adipose tissue assists to a constant body temperature. 2. Carbohydrates are primarily from plant materials. 3. Some vegetables and cereals large amounts of protein.

6 лет назад

Предмет: Английский язык, автор: destroyedforyou

Complete the text with could, couldn't, had to, didn't have to, didn't need to, needn't have, should have or shouldn't have and the verbs in brackets.

History contains a lot of stories about people who (be) should have been a little bit more careful. In 1576 the explorer Sir Martin Frobisher sailed to the north of Canada trying to find a way to Asia. Unfortunately, he (find) ____________ it, but during the voyage, his men landed on Baffin Island as they(look for) __________ food and shelter. Here he discovered some rocks which he thought contained gold. When he returned to England he showed the piece of rock to people who agreed that it was gold, and Frobisher returned to the island with a larger ship. It was a difficult journey, as the ship (avoid)________ huge icebergs. On the island there were polar bears which (kill) ___ a man quite easily. And Frobisher was worried that someone else would get to the gold first. Perhaps he (tell) ____so many people about his discovery, he thought. But he (worry) _______about his secret. He found the place again, and his men (work)__________ in the freezing weather to dig for the gold. They returned to England again, and this time he (stop) ______ his discovery from becoming generally known. More and more people wanted to go to Baffin Island, and the next year the ships came back with hundreds of tonnes of gold. Unfortunately, this is where things went wrong. When Frobisher tried to sell the gold, he discovered that perhaps he (show)___________ it to more people in the first place. The people he had showed it to had been wrong. They(tell) __________the difference between gold and iron pyrite, a compound of iron and sulphur. Everyone laughed at Sir Martin and his men, and he (admit) __________that he had made a mistake.

TEST

1. They hate each other. They ______in love.

a) can be b) may be c) can't be d) can't have been

2. He loves her so much! He ______her when she is away.

a) must have missed b) must be missing c) may have missed d) can't have missed

3. It is eight o'clock. They ______soon.

a) can come b) should have come c) must have come d) must be coming

4. What's that smell! My mother ______be cooking dinner.

a) must b) might c) can't d) could

5. - Where is Nick? — I am not sure. He ______ be playing the piano.

a) mustn't b) might c) can't d) may

6. You ______be joking! No one enjoys taking exams!

a) ought b) mustn't c) must d) might

7. They ______get married! They are so different.

a) mustn't b) can't c) couldn't d) may not

8. He ______be ill because I've just spoken to him.

a) can b) must c)should d) can't

9. His train ______be late because it is always on time.

a) can c) shouldn't

b) can't d) ought

10. It is only ten a.m. She ______at school now.

a) must be b) should have been c) could be d) have be

11. Mary______be in this room. It is her voice.

a) must b) should c) have to d) need

12. Do not phone me at eight o'clock. I ______be watching the football match on TV.

a) could not b) can c) should d) might

6 лет назад

Предмет: Английский язык, автор: Аноним

памагите пожалуста!!!!!!!!!

6 лет назад

Предмет: Химия, автор: mix1234

Как определить валентность и степень окисления

9 лет назад

Предмет: Математика, автор: nellinikolaeva

как на чертить луч? с фото пожалуйста.))

9 лет назад