lim(xsin(1/x²))你这个没写清楚是x是趋于0还是∞因为sin(1/x²)是有界函数-1≤sin(1/x²)≤1的所以当x趋于0时，lim(xsin(1/x²))=0当x趋于∞时，lim(xsin(1/x²))=∞
