Sagot :
Bonjour,
1)
A= 5/6-7/6:(2/7+1)
A = 5/6- 7/6:(2/7+7/7)
A = 5/6- 7/6:9/7
A = 5/6- 7/6*7/9
A = 5/6- 49/54
A = (5*9)/54- 49/54
A = 45/54- 49/54
A = - 4/54
A = - 2/27
2)
B = 2-7²x(5x9-46) ^19 = 2-49(45-46)
B = 2-49(-1)
B = 2+49
B = 51
1)
A= 5/6-7/6:(2/7+1)
A = 5/6- 7/6:(2/7+7/7)
A = 5/6- 7/6:9/7
A = 5/6- 7/6*7/9
A = 5/6- 49/54
A = (5*9)/54- 49/54
A = 45/54- 49/54
A = - 4/54
A = - 2/27
2)
B = 2-7²x(5x9-46) ^19 = 2-49(45-46)
B = 2-49(-1)
B = 2+49
B = 51
Bonjour
A= 5/6-7/6:(2/7+1)
A = 5/6 - 7/6 : ( 2/7 +7/7
A = 5/6 -7/6 : 9/7
A = 5/6 - 7/6 x 7/9
A = 5/6 - 49/54
A = 45/54 - 49/54 = - 4/54 = -2/27
Exercice 2: Donner l'écriture décimale du nombre B en détaillant les calculs. B= 2-7²x(5x9-46) exposant 19
B = 2- 7² x (45 -46)^9
B = 2 - 7² x (-1)^9
B = 2 - (49 x -1)
B = 2 - ( -49)
B = 2+49 = 51
A= 5/6-7/6:(2/7+1)
A = 5/6 - 7/6 : ( 2/7 +7/7
A = 5/6 -7/6 : 9/7
A = 5/6 - 7/6 x 7/9
A = 5/6 - 49/54
A = 45/54 - 49/54 = - 4/54 = -2/27
Exercice 2: Donner l'écriture décimale du nombre B en détaillant les calculs. B= 2-7²x(5x9-46) exposant 19
B = 2- 7² x (45 -46)^9
B = 2 - 7² x (-1)^9
B = 2 - (49 x -1)
B = 2 - ( -49)
B = 2+49 = 51