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-2 < x ≤ 4 -1 < 0.5x ≤ 2 -2 ≤ -0.5x < 1 -2 + 3 ≤ -0.5x + 3 < 1 + 3 1 ≤ -0.5x + 3 < 4 1 ≤ y < 4 So the value range of Y is [1,4]
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