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Quentin11399
@Quentin11399
January 2021
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Aider moi svp je suis au numero 2, je les surligné
Merci
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AhYan
Verified answer
Bonjour,
a) f(x) = aire de ADN
Aire ADN = (AD×DN)/2 or DN = DC - NC = 6-x
Donc on a :
f(x) = [4×(6-x)]/2 = (24-4x)/2 = 12-2x
g(x) = aire de ABM
Aire ABM = (AB×BM)/2
g(x) = 6x/2 = 3x
b) M € [BC] donc x € [0;4]
c) f(2,5) = 12-2×2,5 = 12-5 = 7
g(2,5) = 3×2,5 = 7,5
d) f(x) = 6
12-2x = 6 <=> 2x = 12-6 <=> x = 6/2 = 3
e) g(x) = 6 <=> 3x = 6 <=> x = 6/3 <=> x = 2
f) f est une fonction affine car de la forme y = ax+b.
g est une fonction linéaire car de la forme y = ax.
1 votes
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Quentin11399
Bonjour, merci beaucoup pour votre réponse.
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Verified answer
Bonjour,a) f(x) = aire de ADN
Aire ADN = (AD×DN)/2 or DN = DC - NC = 6-x
Donc on a :
f(x) = [4×(6-x)]/2 = (24-4x)/2 = 12-2x
g(x) = aire de ABM
Aire ABM = (AB×BM)/2
g(x) = 6x/2 = 3x
b) M € [BC] donc x € [0;4]
c) f(2,5) = 12-2×2,5 = 12-5 = 7
g(2,5) = 3×2,5 = 7,5
d) f(x) = 6
12-2x = 6 <=> 2x = 12-6 <=> x = 6/2 = 3
e) g(x) = 6 <=> 3x = 6 <=> x = 6/3 <=> x = 2
f) f est une fonction affine car de la forme y = ax+b.
g est une fonction linéaire car de la forme y = ax.