f(x,y)在点(0,0)处 A无定义 B极限不存在 C极限存在但不连续 D连续函数f(x,y)=y/(x^2+1)sin[1/x^2+y^2] x^2+y^2≠0=0 x^2+y^2=0y/(x^2+1)和sin[1/(x^2+y^2)]是分开的,前面是分式,后面是三角,两者相乘
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 12:42:21
![f(x,y)在点(0,0)处 A无定义 B极限不存在 C极限存在但不连续 D连续函数f(x,y)=y/(x^2+1)sin[1/x^2+y^2] x^2+y^2≠0=0 x^2+y^2=0y/(x^2+1)和sin[1/(x^2+y^2)]是分开的,前面是分式,后面是三角,两者相乘](/uploads/image/z/10097425-1-5.jpg?t=f%28x%2Cy%29%E5%9C%A8%E7%82%B9%280%2C0%29%E5%A4%84+A%E6%97%A0%E5%AE%9A%E4%B9%89+B%E6%9E%81%E9%99%90%E4%B8%8D%E5%AD%98%E5%9C%A8+C%E6%9E%81%E9%99%90%E5%AD%98%E5%9C%A8%E4%BD%86%E4%B8%8D%E8%BF%9E%E7%BB%AD+D%E8%BF%9E%E7%BB%AD%E5%87%BD%E6%95%B0f%28x%2Cy%29%3Dy%2F%28x%5E2%2B1%29sin%5B1%2Fx%5E2%2By%5E2%5D+x%5E2%2By%5E2%E2%89%A00%3D0+x%5E2%2By%5E2%3D0y%2F%28x%5E2%2B1%29%E5%92%8Csin%5B1%2F%28x%5E2%2By%5E2%29%5D%E6%98%AF%E5%88%86%E5%BC%80%E7%9A%84%EF%BC%8C%E5%89%8D%E9%9D%A2%E6%98%AF%E5%88%86%E5%BC%8F%EF%BC%8C%E5%90%8E%E9%9D%A2%E6%98%AF%E4%B8%89%E8%A7%92%EF%BC%8C%E4%B8%A4%E8%80%85%E7%9B%B8%E4%B9%98)
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