x = m²}. Tìm m để A ∩ B ≠ ∅. 172. Cho A = {x ∈ R
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tìm m để a giao b khác rỗng
- x - 1
- x
- x² - 4 = 0}, B = {x ∈ R
- x ≤ 3}, B = {1, m², 5} có giao khác rỗng. 201. Cho A = (-∞, √m), B = (1, +∞). Tìm m để A ∩ B ≠ ∅ (m > 0). 202. Cho A = [√m, +∞), B = (-2, 4]. Tìm m để A ∩ B ≠ ∅ (m ≥ 0). 203. Cho A = (1-√m, 3), B = [-1, 2). Tìm m để A ∩ B ≠ ∅ (m ≥ 0). 204. Cho A = (-3, √m+1], B = (-∞, 1]. Tìm m để A ∩ B ≠ ∅ (m ≥ -1). 205. Cho A = [-4, √m-1), B = [0, +∞). Tìm m để A ∩ B ≠ ∅ (m ≥ 1). 206. Cho A = (√m+2, 5), B = (-∞, -1). Tìm m để A ∩ B ≠ ∅ (m ≥ -2). 207. Cho A = [-2, √m], B = (1, 6). Tìm m để A ∩ B ≠ ∅ (m ≥ 0). 208. Cho A = (√m-2, 3], B = [-3, 0). Tìm m để A ∩ B ≠ ∅ (m ≥ 2). 209. Cho A = [√m+1, 7), B = (-1, 2]. Tìm m để A ∩ B ≠ ∅ (m ≥ -1). 210. Cho A = (-1, √m+2], B = [3, 8). Tìm m để A ∩ B ≠ ∅
- x là ước nguyên dương của 12} và B = {m, 2m} có giao khác rỗng. 44. Tìm m để tập hợp A = {x
- x² - (2m+1)x + m(m+1) = 0}, B = {m, 0} có giao khác rỗng. 148. Tìm m để tập hợp A = {x ∈ R
- x > 2}. Tìm m để A ∩ B ≠ ∅. 2. Cho A = (1, m), B = [3, 5]. Tìm m để A ∩ B ≠ ∅. 3. Cho A = [-2, m+1], B = (0, 4]. Tìm m để A ∩ B ≠ ∅. 4. Cho A = (-∞, m], B = [-3, +∞). Tìm m để A ∩ B ≠ ∅. 5. Cho A = [m, 2], B = (1, 3). Tìm m để A ∩ B ≠ ∅. 6. Cho A = {x ∈ R
- (x-2)(x+3) = 0}, B = {x ∈ R
- x là nghiệm của bất phương trình
- x là số nguyên tố nhỏ hơn m}. Tìm m để A ∩ B ≠ ∅. 17. Cho A = {x ∈ R
-
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