Articles
Register
Sign In
Search
MALIKFC
@MALIKFC
January 2021
1
67
Report
Bonsoir à tous,
Je sais que je m'y prend tard mais j'ai un dm de maths à rendre pour demain. Malgré mes efforts, les maths et moi feront toujours deux...
Pourriez-vous m'aider s'il vous plaît?
Merci d'avance pour toutes vos réponses.
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
loulakar
Verified answer
Exercice 1 :
1) Démontrer :
a) x
b) -x
c) -x + 5
d) (-x + 5) * x
e) x(-x + 5) - 6
f) -x^2 + 5x - 6
Donc f(x) = -x^2+5x-6
2) calcul :
f(2) = -(2^2) + 5*(-2) - 6
f(2) = -4 - 10 - 6
f(2) = -20
f(-3) = -(-3)^2 + 5*(-3) - 6
f(-3) = -9 - 15 - 6
f(3) = - 30
3) calcul :
f(-1/7) = -(-1/7)^2+5*(-1/7)-6
f(-1/7) = -1/49 - 5/7 - 6
f(-1/7) = -1/49-35/49-294/49
f(-1/7) = -330/49
f(V2) = -(V2)^2+5V2 - 6
f(V2) = -2 + 5V2 - 6
f(V2) = -8 + 5V2
Exercice 2 :
1) résoudre :
a) 3x + 7 = 4
3x = 4 - 7
x = (-3) / 3
x = (-1)
b) -7x = 0
x = 0
c) -5(3x - 4) = 2x + 6
-15x + 20 = 2x + 6
15x - 2x = 20 - 6
13x = 14
x = 14/13
2) résoudre :
a) 3x - 5 >= 6x + 2
6x - 3x <= -5 - 2
3x <= -7
x <= -7/3
x € ]-inf;-7/3]
b) 2x-3(5x-2)<12-(2-3x)
2x - 15x + 6 < 12 - 2 + 3x
-13x + 6 < 10 + 3x
6 - 10 < 13x + 3
-4 - 3 < 13x
x > -7/13
1 votes
Thanks 1
MALIKFC
Merci beaucoup! C'est très gentil
More Questions From This User
See All
MALIKFC
January 2021 | 0 Respostas
Responda
×
Report "Bonsoir à tous, Je sais que je m'y prend tard mais j'ai un dm de maths à rendre pour demain. Malgré .... Pergunta de ideia de MALIKFC"
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
Exercice 1 :1) Démontrer :
a) x
b) -x
c) -x + 5
d) (-x + 5) * x
e) x(-x + 5) - 6
f) -x^2 + 5x - 6
Donc f(x) = -x^2+5x-6
2) calcul :
f(2) = -(2^2) + 5*(-2) - 6
f(2) = -4 - 10 - 6
f(2) = -20
f(-3) = -(-3)^2 + 5*(-3) - 6
f(-3) = -9 - 15 - 6
f(3) = - 30
3) calcul :
f(-1/7) = -(-1/7)^2+5*(-1/7)-6
f(-1/7) = -1/49 - 5/7 - 6
f(-1/7) = -1/49-35/49-294/49
f(-1/7) = -330/49
f(V2) = -(V2)^2+5V2 - 6
f(V2) = -2 + 5V2 - 6
f(V2) = -8 + 5V2
Exercice 2 :
1) résoudre :
a) 3x + 7 = 4
3x = 4 - 7
x = (-3) / 3
x = (-1)
b) -7x = 0
x = 0
c) -5(3x - 4) = 2x + 6
-15x + 20 = 2x + 6
15x - 2x = 20 - 6
13x = 14
x = 14/13
2) résoudre :
a) 3x - 5 >= 6x + 2
6x - 3x <= -5 - 2
3x <= -7
x <= -7/3
x € ]-inf;-7/3]
b) 2x-3(5x-2)<12-(2-3x)
2x - 15x + 6 < 12 - 2 + 3x
-13x + 6 < 10 + 3x
6 - 10 < 13x + 3
-4 - 3 < 13x
x > -7/13