bonjour
f (x) = [3 x / ( x² + 1 ) ] + 2
f ( - 1.5 ) = ( - 4.5 / ( 2.25 + 1 ) + 2 = ( - 4.5 / 3.25) + 5 = ≈ 6.38
f ( - 1 ) = ( - 3 / ( 1 + 1 ) + 2 = - 3/2 + 2 = - 3/2 + 4/2 = 1/2 = 0.5
tu fais pareil pour les autres valeurs
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bonjour
f (x) = [3 x / ( x² + 1 ) ] + 2
f ( - 1.5 ) = ( - 4.5 / ( 2.25 + 1 ) + 2 = ( - 4.5 / 3.25) + 5 = ≈ 6.38
f ( - 1 ) = ( - 3 / ( 1 + 1 ) + 2 = - 3/2 + 2 = - 3/2 + 4/2 = 1/2 = 0.5
tu fais pareil pour les autres valeurs