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vescovilisa
@vescovilisa
June 2021
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pouvez vous m'aider ?
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maudmarine
Verified answer
a)
f₁ (x) = 30 + 0,25x
f₂ (x) = 15 + 0,75x
f₃ (x) = 20 + 0,5x
b)
f₁ (x) = f₂ (x)
30 + 0,25x = 15 + 0,75x
0,25x - 0,75x = 15 - 30
- 0,50x = - 15
x = 15/0,50
x = 30
f₂ (x) = f₃ (x)
15 + 0,75x = 20 + 0,5x
0,75x - 0,5x = 20 - 15
0,25x = 5
x = 5/0,25
x = 20
f₁ (x) = f₃ (x)
30 + 0,25x = 20 + 0,5x
0,25x - 0,5x = 20 - 30
0,20x = - 10
x = - 10/0,20
x = - 50
c) et d) tu le feras
e)
f₁ (x) = 30 + 6,25 = 36,25
f₂ (x) = 15 + 18,75 = 33,75
f₃ (x) = 20 + 12,50 = 32,50
La dernière formule est la plus intéressante
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Lista de comentários
Verified answer
a)f₁ (x) = 30 + 0,25x
f₂ (x) = 15 + 0,75x
f₃ (x) = 20 + 0,5x
b)
f₁ (x) = f₂ (x)
30 + 0,25x = 15 + 0,75x
0,25x - 0,75x = 15 - 30
- 0,50x = - 15
x = 15/0,50
x = 30
f₂ (x) = f₃ (x)
15 + 0,75x = 20 + 0,5x
0,75x - 0,5x = 20 - 15
0,25x = 5
x = 5/0,25
x = 20
f₁ (x) = f₃ (x)
30 + 0,25x = 20 + 0,5x
0,25x - 0,5x = 20 - 30
0,20x = - 10
x = - 10/0,20
x = - 50
c) et d) tu le feras
e)
f₁ (x) = 30 + 6,25 = 36,25
f₂ (x) = 15 + 18,75 = 33,75
f₃ (x) = 20 + 12,50 = 32,50
La dernière formule est la plus intéressante