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Which of the following sets are equal?
A = {n € Z : |n| < 2}
B = {n € Z : n^3 = n}
C = {n € Z : n^2 ≤ n}
D = {n € Z : n^2 ≤ 1}
E = {-1, 0, 1}

I think that A = E, B = E, and D = E, but I am not sure.

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    All correct!

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