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Sagot :

Bonsoir

résoudre un problème : (3/5)^7 *5^5 *3^-5​

= 3^7/5^7 x 5^5 x 3^(-5)

= 3^(7-5) x 5^(5-7)

= 3^2 x 5^(-2)

= 3^2/5^2

= (3/5)^2

= 9/25

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