Bonjour qui pourrait m’aider ? Svp

Réponse :

Explications étape par étape

Bonjour

Calculer :

(7/2 - 1)/(6/5 + 3)

= (7/2 - 2/2)/(6/5 + 15/5)

= (5/2)/(21/5)

= 5/2 x 5/21

= 25/42

1 + (1/(1 + 1/(1 + (1/1))))

= 1 + (1/(1 + (1/(1 + 1))))

= 1 + (1/(1 + (1/2)))

= 1 + (1/(1 + 1/2))

= 1 + (1/(2/2 + 1/2))

= 1 + (1/(3/2))

= 1 + 2/3

= 3/3 + 2/3

= 5/3

(8/3 + 5/2)/(5/6 - 1/3)

= (16/6 + 15/6)/(5/6 - 2/6)

= (31/6) / (3/6)

= 31/6 x 6/3

= 31/3

2 + (1/(2 + (1/(2 + 1/2)))

= 2 + (1/(2 + (1/(4/2 + 1/2))))

= 2 + (1/(2 + (1/(5/2))))

= 2 + (1/(2 + 2/5))

= 2 + (1/(10/5 + 2/5))

= 2 + (1/(12/5))

= 2 + 5/12

= 24/12 + 5/12

= 29/12

Écriture scientifique :

E = (6 x 10^8 x 21 x 10^4)/(9 x 10^3)

E = (6 x 21 / 9) x 10^(8+4-3)

E = 14 x 10^9

E = 1,4 x 10^10

F = (-4 x 10^(-4) x 80 x (10^5)^3)/(5 x 10^2)

F = (-4 x 80 / 5) x 10^(-4+5*3-2)

F = -64 x 10^(-6+15)

F = -64 x 10^9

F = -6,4 x 10^10