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Sagot :

NBA10

Réponse :

bonjour,

D= ( 1/2- 3/4 ) × 4/9

= ( 1×2/2×2 - 3/4 ) × 4/9

= (2/4 - 3/4 ) × 4/9

= -1/4 ×4/9

= -4/36

= - 4×1/4×9

= -1/9

voila:)

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