Réponses

2013-03-08T19:22:16+01:00

A = 2 - 1/3 sur (1/2)²

= 2x3/1x3 - 1/3 sur 1/4

= 6 - 1/3 sur 1/4

= 5/3 sur 1/4

= 5/3 x 4/1

= 20/3

 

B = - 4 x 10-² x (-5) x 10^7 / 3 x 10^5

= 20 x 10^5 x 10^-5 / 3

= 20/3

2013-03-08T19:26:29+01:00

A = (2 - 1/3) / (1/2)²

   = (5/3) / (1/4)

   = 20/3

 

B = (4 x 5 x 10^5) / (3 x 10^5)

    = 20/3

 

d'où A = B = 20/3