• 2022-06-19
    设[tex=17.571x4.786]3hRmRrUJOhe4GuvitGjZ3LCuDVr1Z6WdsUcr7PQPj2kTT00g4mp85UwxTH/kXkD+ybeO7aOS8kSV3tbC89m3b2Ck0miGmly0pm+FClpDPAEtqE2vOEDuzvMgjqFNlezRBP8rndfFXSHfHh6RYLrK3UhaKTHTOx2xDxivrVzX7f93vapCdLcy0/whF3VIByJbzsP7B0UYWM5rnEH0mreLbQ==[/tex]证明[tex=2.857x1.286]tj1rvgP4AHIdbrLux0kAEQ==[/tex]在点[tex=2.143x1.286]q8d9ecMZwZI3gbdeOe+7AA==[/tex]处连续且偏导数存在,但不可微分。