Sagot :
bonjour
f (x) = - 2 x + 8
f ( 3) = - 6 + 8 = 2 donc courbe 2
- 2 x + 8 = 6
- 2 x = 6 - 8
- 2 x = - 2
x = 1
f ( 1) = 6
le tableau , tu remplaces x par sa valeur
Réponse :
Explications étape par étape
Bonjour
1) c’est la droite
2) f(3) = -2 * 3 + 8 = -6 + 8 = 2
3) -2x + 8 = 6
8 - 6 = 2x
2 = 2x
x = 2/2
x = 1
4) tableau :
f(-2) = -2 * (-2) + 8 = 4 + 8 = 12
f(-1) = -2 * (-1) + 8 = 2 + 8 = 10
f(0) = -2 * 0 + 8 = 0 + 8 = 8
f(1) = -2 * 1 + 8 = -2 + 8 = 6
f(2) = -2 * 2 + 8 = -4 + 8 = 4
f(3) = -2 * 3 + 8 = -6 + 8 = 2
x ....| -2 | -1 | 0 | 1 | 2 | 3
f(x) | 12 | 10 | 8 | 6 | 4 | 2