Articles
Register
Sign In
Search
Colline14
@Colline14
January 2021
1
102
Report
Bonsoir,
J'ai un exercice à faire et je ne le comprends pas pourriez-vous m'aider s'il vous plait.
Merci d'avance.
Je ne comprends pas les questions 3 4 5 6 et 7
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
trudelmichel
Verified answer
Bonjour,
3) calcul des bases
BC=6 QR=x
calcul hauteur
RB=100-x
A= 1/2( BC +QR)xRB
A=1/2(60+x)(100-x)
A=1/2(6000+100x-60x-x²)
A=1/2(-x²+40x+6000
A= -0.5x²+20x+3000
4)Aire du rectangle 60x100=6000
1/2A=3000
-0.5x²+20x+3000=3000
-0.5x²+20x=0
x(-0.5x+20)=0
x=0
-0.5x+20=0 -0.5x=-20 0.5x=20 x=40
5)-0.5x²+20x+3000=-0.5(x²-40x)+300
-0.5( x²-40x+400)-400+3000
-0.5(x-20)²+2600
6)A=3100
-0.5(x-20)²+2600=3100
-0.5(x-20)²=500
(x-20)²=500/-0.5
500/-0.5<0
impossible que (x-20)²<0
valeur maximale
-0.5x²+20x+3000
abscisse =-b/2a =-20/-0.5x2 = 20/1=20
x=20 donnera la valeur maximale
si x=20 alors A=-0.5(x-20)+2600
A= 2600
0 votes
Thanks 0
More Questions From This User
See All
Colline14
June 2021 | 0 Respostas
Responda
Colline14
June 2021 | 0 Respostas
Responda
Colline14
June 2021 | 0 Respostas
Responda
Colline14
June 2021 | 0 Respostas
Responda
Colline14
June 2021 | 0 Respostas
Responda
Colline14
June 2021 | 0 Respostas
Responda
Colline14
June 2021 | 0 Respostas
Responda
Colline14
June 2021 | 0 Respostas
Responda
Colline14
June 2021 | 0 Respostas
Responda
Colline14
January 2021 | 0 Respostas
Responda
×
Report "Bonsoir, J'ai un exercice à faire et je ne le comprends pas pourriez-vous m'aider s'il vous plait. M.... Pergunta de ideia de Colline14"
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
Bonjour,3) calcul des bases
BC=6 QR=x
calcul hauteur
RB=100-x
A= 1/2( BC +QR)xRB
A=1/2(60+x)(100-x)
A=1/2(6000+100x-60x-x²)
A=1/2(-x²+40x+6000
A= -0.5x²+20x+3000
4)Aire du rectangle 60x100=6000
1/2A=3000
-0.5x²+20x+3000=3000
-0.5x²+20x=0
x(-0.5x+20)=0
x=0
-0.5x+20=0 -0.5x=-20 0.5x=20 x=40
5)-0.5x²+20x+3000=-0.5(x²-40x)+300
-0.5( x²-40x+400)-400+3000
-0.5(x-20)²+2600
6)A=3100
-0.5(x-20)²+2600=3100
-0.5(x-20)²=500
(x-20)²=500/-0.5
500/-0.5<0
impossible que (x-20)²<0
valeur maximale
-0.5x²+20x+3000
abscisse =-b/2a =-20/-0.5x2 = 20/1=20
x=20 donnera la valeur maximale
si x=20 alors A=-0.5(x-20)+2600
A= 2600