Hey guys/ girls and thanks in advance(adsbygoogle = window.adsbygoogle || []).push({});

Okay this may seem like the dumbest question on the planet. But i figure i better ask before i waste the lecture's time of booking a consult.

Whats the derivative of

[itex]y(x) = e^{5ix}[/itex]

where 5i is a complex number

both the partial and standard derivative would be

[itex]\frac{dy}{dx} =\frac{\partial y}{\partial x} = 5i*e^{5ix}[/itex]

In the notes the 'i' is missed at various stages but he arrives at the correct solution which Ive verified with other sources. Just the derivation i question... since it uses

[itex]\frac{dy}{dx} =\frac{\partial y}{\partial x} = 5*e^{5ix}[/itex]

Any particular reason this could even be true.... ??? (Im just thinking a big typo but its over many pages so yea....)

Cheers Trent

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# General Derivative Question

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