Determinati elementrle multimi A={ x∈N | 15 pe x-2∈N}

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Grade: Education Subject: matematica
Determinati elementrle multimi A={ x∈N | 15 pe x-2∈N}
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Asta inseamna ca x-2 este un divizor al lui 15.
D15={1,3,5,15}
x-2=1=>x=3
x-2=3=>x=5
x-2=5=>x=7
x-2=15=>x=17.
Deci x = {3,5,7,17}