Réponse:
1)
(x)/(x-1) +2 = (x)/(x-1) +2(x-1)/(x-1) = (x+2x-2)/(x-1) = (3x-2)/(x-1)
2) B(x) = 0 pour 3x -2 = 0 donc pour x = 2/3
3) a)
(11*11+2*11-2)/(11-1) = 14.1
(3*11-2)/(11-1) = 3.1
(11*11+2*11-2)/(11-1) - (3*11-2)/(11-1) = 14.1-3.1 = 11
b)Existe pour x-1 différents de 0 donc x différents de 1.
(x^2 +2x -2)/(x-1) - (3x-2)/(x-1) =(x^2 +2x -2 -3x+2)/(x-1) = (x^2-x)/(x-1) = x(x-1)/(x-1) = x
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Réponse:
1)
(x)/(x-1) +2 = (x)/(x-1) +2(x-1)/(x-1) = (x+2x-2)/(x-1) = (3x-2)/(x-1)
2) B(x) = 0 pour 3x -2 = 0 donc pour x = 2/3
3) a)
(11*11+2*11-2)/(11-1) = 14.1
(3*11-2)/(11-1) = 3.1
(11*11+2*11-2)/(11-1) - (3*11-2)/(11-1) = 14.1-3.1 = 11
b)Existe pour x-1 différents de 0 donc x différents de 1.
(x^2 +2x -2)/(x-1) - (3x-2)/(x-1) =(x^2 +2x -2 -3x+2)/(x-1) = (x^2-x)/(x-1) = x(x-1)/(x-1) = x