Which interval of xxx satisfies x3−4xx2+2x−3≤0\frac{x^3 - 4x}{x^2 + 2x - 3} \leq 0x2+2x−3x3−4x≤0?
(−∞,−3)∪[−2,1)∪[2,∞)(-\infty, -3) \cup [-2, 1) \cup [2, \infty)(−∞,−3)∪[−2,1)∪[2,∞)
(−∞,−3)∪[−2,1)∪[2,∞)(-\infty, -3) \cup [-2, 1) \cup [2, \infty)(−∞,−3)∪[−2,1)∪[2,∞) is wrong; (−∞,−3)∪[−2,1)∪[2,∞)(-\infty, -3) \cup [-2, 1) \cup [2, \infty)(−∞,−3)∪[−2,1)∪[2,∞)
(−∞,−3)∪[−2,1]∪[2,∞)(-\infty, -3) \cup [-2, 1] \cup [2, \infty)(−∞,−3)∪[−2,1]∪[2,∞)