• 2022-06-19
     证明:[tex=18.929x4.643]5Cmgwu1OybHBcWwAUtmUQV3NcTOfBSe5Uqc3D2ja1mB0KJT9r6Zaqs79OcpRahcysuLbbMNudc6vXgB9o3Fh3n4CHFNIZovOoYNjG9yVIWVjhbz2H6P4ytChhzS4mWvVqrH/OThqgOv/v7uGdx7tbjUQ4NPEzHCACvT6XdcI4ZpzaTiWXUR+KfaKMNspLvzJ[/tex]偏导数处处存在、偏导数在原点  不连续,在原点可微.
  • 举一反三