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# Write definitions using elementhood tests for the following sets: {5, 10, 15, 20, 25, 30, .} { -4, -3, -2, -1, 0, 1, 2, 3} {2, 3, 5, 7, 11, 13, 17,...

Write definitions using elementhood tests for the following sets:

{5, 10, 15, 20, 25, 30, …}

{ -4, -3, -2, -1, 0, 1, 2, 3}

{2, 3, 5, 7, 11, 13, 17, 19, 23, …}

I know the first problem are multiples of 5 that goes to infinite. The second problem are the integers from negative 4 until positive 3 only. The third problem are natural numbers from 2 until infinite but I'm not sure if the braces notations I have are correct. Thank you for your help.