• 2022-06-26
    当[img=39x16]17e0c4c564397d0.jpg[/img]时,[img=49x20]17e0c4c57110256.jpg[/img]是[img=44x19]17e0c4c57dfc490.jpg[/img]的. (填“高阶无穷小”、“低阶无穷小”、“同阶无穷小”或“等价无穷小”)