• 2022-06-06
    求下面参数方程的二阶导数.[tex=8.0x3.357]7EJHVCtO2IWq3KpdB+jQshKQOxbCXQe3UJWRVZc7cnvwK8nMSk9c9zDaBObJC4hX8MCNW0lJ5leplZyggAxJYqhlN466gPlUje1NFC+TFgI=[/tex]