Mathematics · Inequalities
For x, a, δ ∈ R and δ ≥ 0, the inequality |x - a| ≤ δ is equivalent to:
- 12a + δ ≤ 2x ≤ 2a - δ
- 2a - δ ≤ x ≤ a + δ✓
- 32a - δ ≤ 2x ≤ 2a + δ
- 4a + δ ≤ x ≤ a - δ
Correct answer
a - δ ≤ x ≤ a + δ
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