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Sagot :

Bonjour

1) f (x) = - 3x + 2

f(5) = - 3 * 5 + 2 = - 15 + 2 = - 13

2) f(x) = 0

- 3x + 2 = 0

- 3x = - 2

x = 2/3

3) f (x) = - 3x + 2

f(- 2) = - 3 * (- 2) + 2 = 6 + 2 = 8.

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