On considère la fonction f(x) = x3 – 3x2 + 2x +1 - 1. Calculer f(5) 2. Calculer f(-2) 3. Calculer f(1/3)
Mathématiques
roroladisco302
Question
On considère la fonction f(x) = x3 – 3x2 + 2x +1 -
1. Calculer f(5)
2. Calculer f(-2)
3. Calculer f(1/3)
1. Calculer f(5)
2. Calculer f(-2)
3. Calculer f(1/3)
2 Réponse
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1. Réponse yayamohamed
Explications étape par étape:
f(5) = 5³ - 3•5² + 2•5 + 1
= 61
f(-2) = (-2)³ - 3•(-2)² + 2•(-2) + 1
= -23
f(1/3) = (1/3)³ - 3•(1/3) + 2•(1/3) +1
= 37/27
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2. Réponse maA128
F(5)= 5x3-3x2+2x5+1
F(5)= 15-6+10+1
F(5)=20
F(-2)= -2x5-3x2+2x(-2)+1
F(-2)= -10-6+(-4)+1
F(-2)= -20+1
F(-2)= -19
F(1/3) = 1/3x3-3x2+2x1/3+1
F(1/3)= 1-6+2/3+1
F(1/3)= -5+2/3+1
F(1/3)= -5+5/3