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Sagot :

Bonsoir,

n(x)= 1/ ((x-2)(x+1))

calcul de n(-2)

n(-2)= 1/ ((-2-2))(-2+1))= 1/ ((-4)(-1))= 1/4

calcul de n(2)

n(2)= 1/ ((2-2))(2+1))= 1/ ((0)(3))= 1/0  donne l'infini.

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