If $f(x)$ and $g(\alpha)$ is a pair of Fourier transforms, then how can we show that $df/dx$ and $i\alpha g(\alpha)$ is a pair of Fourier transforms?
Conjugate pairs in Fourier transforms but with Fourier coefficients
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real-analysis
fourier-analysis
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2If you'd like others to take the time to help you, it only makes sense to take the time to expand on what you have tried and to typeset your question so it's a bit more readable. You've asked 31 question here; by now you should know how to ask a question on this site. – 2012-11-13