k=0(k=1, 2, ⋅ ⋅ ⋅).(2)如果f(x−π)=f(x), 则f( k=0(k=1, 2, ⋅ ⋅ ⋅).(2)如果f(x−π)=f(x), 则f( 发布时间:2026-01-24 16:00:48