Предмет: Математика, автор: Normsty

Ксюша помоги пожалуйста

Приложения:

Ответы

Автор ответа: qshoW
1

1.10 У прямоугольника диагонали равны, т.е. АС = BD= 10см и точной пересечения делятся пополам, т.е. AO=OC=OB=OD= 5 см.

Отсюда: AD = P -AO-OD = 17-5-5=7 см.

Ответ: 7 см


2.1. Нули функции это точки, в которых функция равняется нулю.

Имеем систему уравнений:

х^2 +3x +2 =0

|x|-1 ≠ 0

Решаем:

|x|=1, отсюда х ≠ 1 и х ≠ -1


x^2 +3x+2=0

D = 9-8 = 1

х1 = (-3+1)/2 = -1 (не в ходит)

х2 = (-3-1)/2 = -2

Отсюда: х=-2 - ноль функции



2.2. P=5! = 120

2.3.

Приложения:
Похожие вопросы
Предмет: Английский язык, автор: sayazhas17032010
Read the text and choose a, b or c.
1. Covent Garden is
a) mainly popular with tourists. b) mainly popular with Londoners. c) popular with everybody.
2. Performers have to
a) pay before they can perform.​b) pass a test and pay. c) pass a test.
3. The people in the audience
a) decide what to pay. b) don’t pay anything. c) all pay the same.
4. George
a) studies circus skills. b) is touring Britain. c) usually performs in London.
5. He usually
a) starts his show with a big audience. b) starts his show with no audience.
c) tries to get a crowd before he starts a show.
6. Chantelle plays at Covent Garden because
a) she wants to. b) she hasn’t got a job. c) her orchestra plays there.


Lexical-grammar test
1. I … anything since breakfast.
A) didn’t eat B) haven’t eaten C) haven’t ate
2. … they watching the parade this afternoon?
A) was B) did​​C) were ​​
3. … an accident?
A) He has had B) Had he C) Has he had
4. Tom … reading at 3:00 today.
A) didn’t B) wasn’t ​​C) weren’t
5. My parent were sitting in the garden while we … a DVD.
A) was watching B) were watching C) watched​​
6. … ridden a camel?
A) You have ever B) Did you ever C) Have you ever ​​
7. She has … some amazing photos.
A) taken B) took ​C) takes
8. David was taking photos at the party … everyone else was dancing.
A) then B) while C) so
9. What did you … for dinner yesterday?
A) eats B) ate C) eat
10. Dana … the dog at the moment.
A) is walking B) walks C) are walking
11. Tina is very polite. She’s … rude to people.
A) always ​B) never ​C) often
12. They … a long time at the museum.
A) didn’t spend​​B) didn’t spent C) not spent
13. I … what to say!
A) didn’t know ​B) not know ​C) didn’t knew
14. I … TV every evening.
A) watches ​B) watch ​C) am watching
Предмет: Биология, автор: vdfidityfucjvj