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Sagot :

Bonjour,

A=

5/6 -1/24 -7/12

= 20/24 - 1/24 - 14/24

= 5/24

B=

5/6 +1/24 -7/12

= 20/24 +1/24 - 14/24

=  7/24

C=

5/6 -( -1/24 -7/12)

=  5/6 +1/24 +7/12

=  20/24 +1/24 +14/24

= 35/24

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