Réponse :
Explications étape par étape
B = (4³x25³x10) / (5^(-6)x 400^(-3)x10²)
B = [(2²)³x((5)²)³x2x5] / [5^(-6)x (2²x(2x5)²)^(-3)x(2x5)²]
B = [2^(6+1)x5^(6+1)] / [5^(-6)x(2^4x5^2)^(-3)x2²x5²]
B = (2^7x5^7) / [5^(-6)x2^(-12)x5^(-6)x2²x5²]
B = (2^7x5^7) / [5^(-6-6+2)x2^(-12+2)]
B = 2^(7-(-10)x5^(7-(-10)
B = 2^17 x 5^17
B = 10^17
C = [21^3 x 35^(-4) x 12^2 ] / [ 14^(-3) x 18^(-5)]
C= [ 3^3 x 7^3 x 7^(-4) x 5^-(4) x (2^2x 3)^2] / [ 2^(-3) x 7^(-3) x (3^2x2)^(-5)]
C= [ 3^3 x 7^(3-4)x 5(-4) x 2^(2x2)x 3^2] / [2^(-3) x 7^(-3) x 3^(-10) x 2^(-5)]
C= ( 3^5 x 7^(-1) x 5(-4) x 2^4) / (2^(-8) x 7^(-3) x 3^(-10))
C = 3^(5-(-10)) x 7^(-1-(-3)) x 5^(-4) x 2^(4-(-8))
C= 2^(12) x 3^15 x 5^(-4) x 7^2
j'espère avoir aidé.
