Hermite Functions (show hermite function belongs in schwartz class )

jac7
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I have been given this question (in the attachment).

I have a deifnition for what it means for a function to be in the schwartz class, but I don't know how to start showing that the hermite function belongs to it?
I have attempted to write out the first couple of terms using the n+1 forumla for the hermite functions but i ended up getting 0 for n=2 term!

I also know, using the hint, when n=0, what the Fourier transform of the hermite function at n=0 is.

If someone could please give me some guidence, it would be a great help!
 
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sorry here is the attachment
 

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Prove $$\int\limits_0^{\sqrt2/4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx = \frac{\pi^2}{8}.$$ Let $$I = \int\limits_0^{\sqrt 2 / 4}\frac{1}{\sqrt{x-x^2}}\arcsin\sqrt{\frac{(x-1)\left(x-1+x\sqrt{9-16x}\right)}{1-2x}} \, \mathrm dx. \tag{1}$$ The representation integral of ##\arcsin## is $$\arcsin u = \int\limits_{0}^{1} \frac{\mathrm dt}{\sqrt{1-t^2}}, \qquad 0 \leqslant u \leqslant 1.$$ Plugging identity above into ##(1)## with ##u...
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