【简答题】The world is filled with smart, talented, educated and gifted people. We meet them every day. A few days ago, my car was not running well. I pulled it into a garage, and the young mechanic had it fixe...
【简答题】一个以 T 为周期的函数 f T ( t ) , 如果在 上满足 Dirichlet 条件 , 即在区间 上 ( 1 ) ( 2 ) 那么,在 f T ( t ) 的连续点处, Fourier 级数的三角形式为: 在间断点 t 处,有 那么,在 f T ( t ) 的连续点处, Fourier 级数的复指数形式为: 在间断点 t 处,有