Sagot :
Réponse :
bonsoir
F = 7/18 x 2/7 - 9 x ( 5/3 - 1 )
F = 1/9 x 1/1 - 9 x ( 5/3 - 3/3 )
f = 1/9 - 9 x 2/3
F = 1/9 - 18/3
F = 1/9 - 54/3
f = - 53/3
G = 5/18 ( 1/15 + 4/5)
G = 5/18 ( 1/15 + 12/15)
G = 5/18 x 13/15
G = 65/270 = 13/54
H = ( 15/7 - 2/7 x 11/3 ) : 3 x ( - 2/3 + 1/5 )
H = ( 15/7 - 22/21 ) : 3 x ( - 10/15 + 3/15 )
H = ( 45/21 - 22 /21 ) : 3 x - 7/15
h = 23/21 : - 21/15
H = 23/21 x - 15/21
H = - 345/441 = - 115/ 147
Explications étape par étape :
Réponse :
F = 7/18 * 2/7 - 9 * (5/3 - 1) = 14/126 - 9(5/3 - 3/3) = 14/126 - 9(2/3) = 2/18 - 18/3 = 1/9 - 6 = 1/9 - 54/9 = -53/9
G = 5/18(1/15 + 4/5) = 5/18(1/15 + 12/15 = 13/15) = 5/18 * 13/15 = 65/270 = 13/54
H = [(15/7 - 2/7 * 11/3)] / [3*(-2/3 + 1/5) = (15/7 - 22/21) / (3*(-10/15 + 3/15)) = - 7/21 / -21/15 = -1/3 / -7/3 = 7/9
Explications étape par étape :