• 试题 ID 21697


设 $z=e^{-x} \sin \frac{x}{y}$, 求 $z_x^{\prime}, z_{x y}^{\prime \prime}\left(2, \frac{1}{\pi}\right)$.
A
B
C
D
E
F
答案:

答案与解析仅限VIP可见

解析:

答案与解析仅限VIP可见