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Write the solution set of the inequation .
|x – 1| ≥ |x – 3|
Squaring both sides
|x – 1|2 ≥ |x – 3|2
(x – 1)2 ≥ (x – 3)2
x2 – 2x + 1 ≥ x2 – 6x + 9
4x – 8 ≥ 0
x ≥ 2
x ∈ [2, ∞)