Bonjour.
Une fonction affine est de la forme ax + b
Je te propose f(x) = x - 2
Si on prend x = 2, on a f(2) = 2 - 2 = 0
Si on prend x = 3, on a f(3) = 3 - 2 = 1 > 0
Si on prend x = 1, on a f(1) = 1 - 2 = - 1 < 0
Je te propose g(x) = -x + 3
Si on prend x = 3, on a f(3) = - 3 + 3 = 0
Si on prend x = 4, on a f(4) = - 4 + 3 = - 1 < 0
Si on prend x = 2, on a f(2) = - 2 + 3 = 1 > 0
En te souhaitant une bonne journée :)
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Bonjour.
Une fonction affine est de la forme ax + b
Je te propose f(x) = x - 2
Si on prend x = 2, on a f(2) = 2 - 2 = 0
Si on prend x = 3, on a f(3) = 3 - 2 = 1 > 0
Si on prend x = 1, on a f(1) = 1 - 2 = - 1 < 0
Je te propose g(x) = -x + 3
Si on prend x = 3, on a f(3) = - 3 + 3 = 0
Si on prend x = 4, on a f(4) = - 4 + 3 = - 1 < 0
Si on prend x = 2, on a f(2) = - 2 + 3 = 1 > 0
En te souhaitant une bonne journée :)