Предмет: Алгебра, автор: tryttyty

Помогите решить !!! Срочно!...

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Ответы

Автор ответа: Аноним
0
 sqrt{x^2+4x-12} \ D(x)-? \ x^2+4x-12 geq 0  \ x^2+6x-2x-12geq0 \ x(x+6)-2(x+6)geq0 \ (x-2)(x+6)geq0 \ x=-6 \ x=2
методом интервалов:
++++----++++
     -6     2
x∈(-∞;-6]∪[2;+∞)


7x^2+16x+4 \ 7x^2+14x+2x+4 \ 7x(x+2)+2(x+2) \ (7x+2)(x+2)

 left { {{(7x+2)(x+2) textgreater  0} atop {x leq 0}}
по методу интервалов:
++++-----++++
     -2    -2/7; 0
x∈(-∞;-2)∪(-2/7;0]
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Complete the gaps in the text with the word which suits the definition. The first letter of the word is given.


1.New York is a huge, 1. c… (having people from different parts of the world) city.

2.It is a melting pot of 2. i…. (people who have come to live permanently in a different country from the one they were born in) communities.

3.where many different backgrounds and traditions 3. m… (join together to form one thing).

4.Mingliang Lu is a Chinese-born artist skilled in the use of Chinese art and 4. c… (the art of producing beautiful handwriting that you do with a special pen or brush).

5.When he first arrived in the USA, Ming used his skills as an artist to make a 5. l... (the money that you earn).

6.He set up his 6. e…(a wooden frame to hold a picture while it is being painted) on the streets and painted portraits of tourists.

7.Now he works for the New York Chinese Cultural centre as a cultural 7. a… (someone who represents a particular sport, business, etc. because they behave in a way that people admire).

8.As a teacher of art in a public school in Harlem, Ming uses his skills and his cultural background to 8. b … (to help you or improve your life) the children he teaches.

9.But Ming sees beyond 9. e… (the fact of belonging to a particular nation or people that shares a cultural tradition):

10.he says children from all countries are alike, whatever their 10. b… (your family and your experience of education, living conditions, money, etc.).
Предмет: Математика, автор: Аноним