bonjour
f (x) = 3 x
donc f ( 4.5) = 3 * 4.5 = 13.5
2 ) f ( - 2) = - 2 * 3 = - 6
3 ) f (a) = 3 * a = 3 a
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bonjour
f (x) = 3 x
donc f ( 4.5) = 3 * 4.5 = 13.5
2 ) f ( - 2) = - 2 * 3 = - 6
3 ) f (a) = 3 * a = 3 a