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n in (-oo:+oo)
3-(n/2) < 2 // - 2
3-(n/2)-2 < 0
1-1/2*n < 0 // - 1
-1/2*n < -1 // : -1/2
n > -1/(-1/2)
n > 2
n in (2:+oo)
(2:+oo)
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