Answered

on considere les nombres suivants
x=-2/3         y=-15/8        z=-7/12

calculer et donner le resultat sous la forme d'une fraction la plus simple possible

a=x+y-z        b=xXyXz           c= xy/z

Sagot :

AFTERSHOCK
A = -(2/3)-(15/8)+(7/12)
A = -(16/24)-(45/24)+(14/24)
A = -47/24

B = -(2/3)*(-15/8)*(7/12)
B = (30/24)*(7/12)
B = 210/288
B = 105/144

C = (-(2/3)*(-15/8))/(7/12)
C = (30/24)/(7/12)
C = (30/24)*(12/7)
C = 360/168
C = 15/7
DROOPETTE
a=x+y-z    
=-2/3+(-15/8)-(-7/12)
=-16/24-45/24+14/24
=-47/24

b=xyz  
=-2/3*(-15/8)*(-7/12 )
=-210/288
=-70/96
=-35/48

c= xy/z
=-2/3*(-15/8)/(-7/12)
=-2/3*(-15/8)*(-12/7)
=-360/168
=-120/56
=-15/7