摘要: Go confidently in the direction of your dreams. Live the life you've imagined. 题目 设曲线 $y = \tfrac{1}{x}$ (1$\leq$x$\leq$+$\infty$) 与X 轴之间的区域为D. 求D绕X轴旋 阅读全文
posted @ 2020-02-24 23:23 Right2014 阅读(802) 评论(0) 推荐(1)