Articles
Register
Sign In
Search
Rimasoundousss
@Rimasoundousss
April 2019
1
595
Report
Bonsoir ! Aidez moi svp
Exercice 1 :
1) Ecrire 17 et 2005 comme différence de deux carrés consécutifs .
2) Vérifier que
est impair puis écrivez le comme différence de deux carrés consécutifs .
Exercice 2 :
SOit a et b deux entiers naturels impairs
Montrer que 8 divise
merci d'avance
Please enter comments
Please enter your name.
Please enter the correct email address.
Agree to
terms and service
You must agree before submitting.
Send
Lista de comentários
laurance
Verified answer
17 = (n+1)² - n² = n² + 2n +1 - n² = 2n +1 = 2 *8 +1 n=8
17 = 9² - 8² = 81 - 64
2005 = 2n +1 = 2*1002 +1 n = 1002
2005 = 1003² - 1002² = 1006009 - 1004004 = 2005
2) n² + n = n(n+1) est toujours pair ( n ou n+1 est forcément pair)
7 est impair
un pair plus un impair = un impair n² +n +7 est toujours impair
n² + n + 7 = (p+1)² - p² = 2p +1 n² + n +6 = 2p
p = (n² +n) /2 + 3
n² + n +7 =( ( n²+n ) /2 + 4 )² - ( (n² + n) /2 + 3 )²
ex2
non
a = 3 b =5 a² +b² -b =9 +25 - 5 = 29 pas divisible par 8
1 votes
Thanks 1
More Questions From This User
See All
rimasoundousss
June 2021 | 0 Respostas
Responda
rimasoundousss
June 2021 | 0 Respostas
Responda
rimasoundousss
June 2021 | 0 Respostas
Responda
rimasoundousss
June 2021 | 0 Respostas
Responda
rimasoundousss
June 2021 | 0 Respostas
Responda
rimasoundousss
January 2021 | 0 Respostas
Responda
rimasoundousss
January 2021 | 0 Respostas
Responda
rimasoundousss
January 2021 | 0 Respostas
Salut ... je veux bien de l'aide svp concernant cet exercice. .. c urgent. .. mrc d'avance.
Responda
Rimasoundousss
May 2019 | 0 Respostas
Responda
Rimasoundousss
April 2019 | 0 Respostas
Responda
×
Report "Bonsoir ! Aidez moi svp Exercice 1 : 1) Ecrire 17 et 2005 comme différence de deux carrés consécut.... Pergunta de ideia de Rimasoundousss"
Your name
Email
Reason
-Select Reason-
Pornographic
Defamatory
Illegal/Unlawful
Spam
Other Terms Of Service Violation
File a copyright complaint
Description
Helpful Links
Sobre nós
Política de Privacidade
Termos e Condições
direito autoral
Contate-Nos
Helpful Social
Get monthly updates
Submit
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
Verified answer
17 = (n+1)² - n² = n² + 2n +1 - n² = 2n +1 = 2 *8 +1 n=817 = 9² - 8² = 81 - 64
2005 = 2n +1 = 2*1002 +1 n = 1002
2005 = 1003² - 1002² = 1006009 - 1004004 = 2005
2) n² + n = n(n+1) est toujours pair ( n ou n+1 est forcément pair)
7 est impair
un pair plus un impair = un impair n² +n +7 est toujours impair
n² + n + 7 = (p+1)² - p² = 2p +1 n² + n +6 = 2p
p = (n² +n) /2 + 3
n² + n +7 =( ( n²+n ) /2 + 4 )² - ( (n² + n) /2 + 3 )²
ex2
non
a = 3 b =5 a² +b² -b =9 +25 - 5 = 29 pas divisible par 8