设f(u,v)为二元可微函数,Z=f(sin(x+y),exy),则?z?x=______

2024-11-22 20:37:06
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回答1:

设u=sin(x+y),v=exy,则z=f(u,v)

?z
?x
?f
?u
?u
?x
+
?f
?v
?v
?x
=cos(x+y)
?f
?u
+yexy
?f
?v
=cos(x+y)f1′+yexyf2