不等式组 3x大于等于4x-1 和 5x-1/2大于x-2解集为
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推荐于2017-09-20
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3x≥4x-1 → 3x-4x≥-1 → -x≥-1 → x ≤ 1
5x-1/2>x-2 → 5x-x>-2+1/2 → 4x>-3/2 → x > -3/8
-3/8 < x ≤ 1
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3x≥4x-1 → 3x-4x≥-1 → -x≥-1 → x ≤ 1
(5x-1)/2>x-2 → 5x-1>2x-4 → 5x-2x>-4+1 → 3x >-3 → x>-1
-1 < x ≤ 1
5x-1/2>x-2 → 5x-x>-2+1/2 → 4x>-3/2 → x > -3/8
-3/8 < x ≤ 1
=====================================================
3x≥4x-1 → 3x-4x≥-1 → -x≥-1 → x ≤ 1
(5x-1)/2>x-2 → 5x-1>2x-4 → 5x-2x>-4+1 → 3x >-3 → x>-1
-1 < x ≤ 1
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引用wqqts的回答:
3x≥4x-1 → 3x-4x≥-1 → -x≥-1 → x ≤ 1
5x-1/2>x-2 → 5x-x>-2+1/2 → 4x>-3/2 → x > -3/8
-3/8 < x ≤ 1
=====================================================
3x≥4x-1 → 3x-4x≥-1 → -x≥-1 → x ≤ 1
(5x-1)/2>x-2 → 5x-1>2x-4 → 5x-2x>-4+1 → 3x >-3 → x>-1
-1 < x ≤ 1
3x≥4x-1 → 3x-4x≥-1 → -x≥-1 → x ≤ 1
5x-1/2>x-2 → 5x-x>-2+1/2 → 4x>-3/2 → x > -3/8
-3/8 < x ≤ 1
=====================================================
3x≥4x-1 → 3x-4x≥-1 → -x≥-1 → x ≤ 1
(5x-1)/2>x-2 → 5x-1>2x-4 → 5x-2x>-4+1 → 3x >-3 → x>-1
-1 < x ≤ 1
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错错错,肯定是错
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