Предмет: Математика, автор: heeeelllooooo

Найдите наименьшее значение суммы x+y+z,
где x, y, z-натуральные числа и 4у=7z, х=2z

Ответы

Автор ответа: seins88
2

Ответ:

=19

Пошаговое объяснение:

Min(x+y+z)= ?

4y=7z=> y=7z/4    ;   x=2z

2z+7z/4+z = 3z+7z/4

7z/4∈N => z(min)=4

=>Min(x+y+z)= 3*4+7*4/4 = 19

matilda17562: Впишите, пожалуйста, подробные пояснения.
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: chycftdxttx
79. Раскрой скобки, употребив герундий или инфинитив.
1. You should try to eat (eat) more fruit. It's good for your health.
2. Mary tried
3. I didn't mean
4. Being a doctor means
5. Michael went on
(finish) her composition, but it was too difficult.
(interrupt) you.
(work) long hours.
(sleep) for another 2 hours.
6. She introduced herself and went on
7. We regret
(talk) about her new book.
(inform) you that the flight is cancelled.
(argue) with his best friend.
8. Jim regrets
9. Harry is afraid
(climb) the mountains.
10. She never drives her father's car as she is afraid of
(crash) it.​
1 год назад
Предмет: Биология, автор: edrikryt
Помогите пожалуйста с решением
4. Жінка з |(0)Rh(-) групою крові вийшла заміж
за чоловіка з IV(AB) Rh(+) групою крові.
Який варіант групи крові та резус-фактора
можна очікувати у дітей?
5. До лікарні звернулося подружжя, де жінка
має нормальну будову кисті, а чоловік
страждає на полідактилію, з питанням: чи
можливе успадкування цієї аномалії їх
майбутньою дитиною, причому перша їх
дитина має нормальну будову кисті. Відомо,
що ген полідактилії є домінантним. Яка
ймовірність народження шестипалої дитини
в даного подружжя?
1 год назад
Предмет: Математика, автор: annaschokolad
сократить дробь 2240/100
1 год назад
Предмет: Английский язык, автор: kekuwkaaa18
Find a sentence in Present Progressive: A) Last year we in France. B) Have you cleaned the floor? C) Are you from New Zealand? D) I’m making a cheese cake right now. E) They are going to kook for a present. 6. Choose the right verb form: A) we is playing B) we has playing C) we are playing D) we are plaing E) we was playing 7. Choose the right verb form: A) He sung B) He singed C) He sungs D) He sang E) He sangs 8. Choose the correct variant: A: What … in your spare time? B: I often go swimming A) do you do B) are you doing C) have you done D) are you do E) does you do 9. Find the verb form in Present Perfect Progressive: A) Has V3 B) Had V3 C) am, is, are +Ving D) Have/has been Ving E) Have/Has been V3 10. Choose the correct variant: There are 584 students at the department: А) Five and hundred eighty-four. В) Five hundred and eighty-four. С) Five eighty-four hundred. D) Five hundred eighty fourth. E) Five hundred and eighty four. 11. Choose the word to the definition: It is a person who doesn’t wear fur and leather clothes, and doesn’t eat diary products, meat and fish. A) A meat-eater B) my Granny C) a child D) a vegetarian E) a sick person 12. Choose the correct variant: … you at school yesterday? – Yes, I … А) Were/was В) Am/is С) Were/were D) Was/was Е)Was/were 13 Choose the correct variant: Listen! That boy … the saxophone. A) plays B) played C) is playing D) will play E) is going to play 14. Choose the correct variant: Mark … swimming yesterday. A) go B) has gone C) is going D) went E) will play 15. Choose the correct answer: A: Have you ever been to England? B: … A) No, I haven’t B) No, I did C) No, I have D) No, I don’t E) No, I hasn’
7 лет назад
Предмет: Литература, автор: mishaletspleitshik29
Рассказать подробно о Штольце из Обломова
И. Гончарова
7 лет назад