j'ai besoin de vous pour un exercices de math je vous remercie d'avance A= 7x-1 B= 7X(x-1) C = (2x-1)X(3-x) si x=-2 ; x=1/3 ; x=(2x-1)X(3-x)
Mathématiques
Kovan534
Question
j'ai besoin de vous pour un exercices de math je vous remercie d'avance
A= 7x-1
B= 7X(x-1)
C = (2x-1)X(3-x)
si x=-2 ; x=1/3 ; x=(2x-1)X(3-x)
A= 7x-1
B= 7X(x-1)
C = (2x-1)X(3-x)
si x=-2 ; x=1/3 ; x=(2x-1)X(3-x)
1 Réponse
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1. Réponse maudmarine
Si x = 2
A = 7x - 1
A = 7 * 2 - 1
A = 14 - 1
A = 13
B= 7X(x-1)
B = 7 * (2 - 1)
B = 7 * 1
B = 7
C = (2x-1)X(3-x)
C = (2 * 2 - 1) * (3 - 2)
C = (4 - 1) * (2)
C = 3 * 2
C = 6
Si x = 1/3
A = 7x - 1
A = 7 * 1/3 - 1
A = 7/3 - 1
A = 7/3 - 3/3
A = 4/3
B = 7 X (x - 1)
B = 7 * (1/3 - 1)
B= 7 * (1/3 - 3/3)
B = 7 * - 2/3
B = - 14/3
C = (2x-1)X(3-x)
C = (2 * 1/3 - 1) * (3 - 1/3)
C = (2/3 - 1) * (9/3 - 1/3)
C = (2/3 - 3/3) * (8/3)
C = - 1/3 * 8/3
C = - 8/9