Mathematics, 26.02.2021 16:30 quanyoung88

Soit I = [-1;1] on definit une loi # sur E par : x#y = x+y-xy montrer que # est un loi de composition interne commutative et associative

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Soit I = [-1;1] on definit une loi # sur E par : x#y = x+y-xy montrer que # est un loi de compositi...

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