How do I differentiate

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Main Question or Discussion Point

How do I differentiate

f(x,t) = expi(kx-wt)

f'(x,t) = ?
f''(x,t) = ?
 

Answers and Replies

cristo
Staff Emeritus
Science Advisor
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What do your primes denote differentiation with respect to?

Write your expression as exp(ikx).exp(-iwt). Depending upon what you are differentiating with respect to, one of these terms can be treated as a constant. You know how to differentiate exp(x), right?
 
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Does it make a difference if "i" is involved?
 
No .
 

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