若f(x)在点x连续,证明f2(x)与 |f(x)|在点x也连续。反之,f2(x)或 |f(x)|在点x连续,能否断言f(x)在点x连续?
若f(x)在点x连续,证明f2(x)与 |f(x)|在点x也连续。反之,f2(x)或 |f(x)|在点x连续,能否断言f(x)在点x连续?
发布时间:2024-11-12 11:34:47
若f(x)在点x连续,证明f2(x)与 |f(x)|在点x也连续。反之,f2(x)或 |f(x)|在点x连续,能否断言f(x)在点x连续?