Réponses

2013-05-30T16:27:48+02:00

Exercice 2 : 

 

1)A = 9 * 3⁴ / 3⁻⁵ * 27

A = 27⁴ / 81⁻⁵

A = -54⁻¹

 

B = 4⁻² * 2⁴ / 2⁻⁹

B = 8² / 2⁻⁹

B = 6⁻⁷

   

2) C = 42 * 10⁻³ * 5 * 10⁶ / 3 * 10⁻⁶

C = 42 * 5 * 10⁻³ * 10⁶ / 0.000003

C = 210 * 10³ / 0.000003

C = 210000 / 0.000003

C = 70000

C = 7 * 10⁴

 

D = 9 * 10⁻⁹ * 2 * ( 10⁻³ )² / 36 * 10⁷

D = 9 * 2 * 10⁻⁹ * 10⁻⁶ / 360000000

D = 18 * 10⁻¹⁵ / 360000000

D = 0.000000000000018 / 360000000

D = 0.00000000000000000000005

D = 5 * 10⁻²³

 

J'espère t'avoir aidé ! :)