bonjour
4 ème ...
A = 7/6 - 1 /2 x 3 /5
A = 7/6 - 3 /10
A = 70/60 - 18/60
= 52/60 = 13/15
B = ( 4/24 + 6/24 ) : - 5 /4
= 10 /24 * - 4/5
= - 40 / 120
= - 1/3
13/15 et - 1/3 ne sont pas inverses
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bonjour
4 ème ...
A = 7/6 - 1 /2 x 3 /5
A = 7/6 - 3 /10
A = 70/60 - 18/60
= 52/60 = 13/15
B = ( 4/24 + 6/24 ) : - 5 /4
= 10 /24 * - 4/5
= - 40 / 120
= - 1/3
13/15 et - 1/3 ne sont pas inverses