Seja o número complexo z = 1 + i. Se z' é o conjugado de z, então o produto |z|.|z'| é igual a

Air travel is such an everyday experience these days that we are not surprised when we read about a politician having talks with the Japanese Prime Minister one day, attending a conference in Australia the following morning and having to be off at midday to sign a trade agreement in Bangkok. But frequent long-distance flying can be so tiring that the traveller begins to feel his brain is in one country, his digestion in another and his powers of concentration nowhere – in short, he hardly knows where he is. The fatigue we normally experience after a long journey is accentuated when we fly from east to west or vice versa because we cross time zones.

We can infer from the text that the traveller normally experiences fatigue

Assinale a alternativa em que a concordância verbal está incorreta.

A long time ago, people a way to create a nice smell. They put nice-smelling wood or leaves into a fire. A nice smell through the smoke. That is how we got the word perfume. In Latin “per” means “through”, and “fumus” means “smoke”. Scientists are finding that some smells make people feel better. They help us to relax, to sleep, or to feel happier. Scientists found that the smell of apples with spices can make our blood pressure go down. In the future, we may use perfume in a completely different way.

The correct verbs to fill in the blanks are, respectively

No triângulo AOB, OB = 5 cm; então AB, em cm, é igual a

A definição oficial de ampère, unidade de intensidade de corrente elétrica no Sistema Internacional é:

“O ampère é a intensidade de uma corrente elétrica que, mantida em dois condutores paralelos, retilíneos, de comprimento infinito, de secção circular desprezível e situados à distância de um metro entre si, no vácuo, produz entre esses condutores uma força igual a 2.10-7 newtons por metro de comprimento.”

Para que a força magnética que atua nos condutores seja de atração,

A Passion For English

Marit grew up in the Netherlands. She is bilingual because her mother is German and her father is Dutch. In high school, Marit studied English, but it was difficult for her. She didn’t like her English classes. They didn’t practice conversation. Marit wanted to learn to speak English so she could learn about people from different cultures.

Marit decided to study in an English-speaking country. She went to school in London when she was 17 years old. Marit was self-disciplined. She made new friends from other countries. They spoke English together. Soon she became comfortable speaking English. English sounded beautiful to her.

When she was 19 years old, Marit made a plan. She decided to study at a college in the United States. At first, the classes were very hard for her.

Marit graduaded 4 years later. She was very proud. She was fluent in English! The college gave her a job as an English teacher, and then she married her American boyfriend a year later. Today, Marit tells her English students, “Hard work and passion pay off!”

According to the first paragraph,

Sabe-se que a equação !$ x^4 – 2x^3 – 8x^2 + 18x – 9 = 0 !$ equivale a (x – 1)!$ ^2 !$ . (x!$ ^2 !$ – 9) = 0. Assim, a raiz de multiplicidade 2 dessa equação é

Leia:

“Ilumina/ Ilumina/ Ilumina,/ Meu peito, canção,/ Dentro dele/ Mora um anjo/ Que ilumina/ O meu coração”

Quanto a pessoa, tempo e modo do verbo iluminar pode-se afirmar:

Com relação à última frase do poema Ingredientes: “E o conto”, não é correto afirmar: