Show that when f(z)=x^3+i(1-y)^3, it is legitimate to write f'(z)=ux+ivx=3x^2 only when z=i.

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- October 11th 2009, 11:02 AMbethhComplex Variables differentiation
Show that when f(z)=x^3+i(1-y)^3, it is legitimate to write f'(z)=ux+ivx=3x^2 only when z=i.

- October 11th 2009, 12:46 PMTheEmptySet