# Math Help - exponential distribution

1. ## exponential distribution

Let X1,....,Xn be iid with pdf $(2x/\theta)*exp(-x^2/theta)$

I have to find the distribution of $X^2$ but first i'm trying to figure out the distribution of this pdf. Is it a exp $(\theta/x)$?

2. Hello,

I don't think it has a name. You can't put x in the parameter of the distribution.
You don't always have to find the name of a distribution before working on it...

But I think X² will follow an exponential distribution :P

3. What technique do I use to find the distribution of $x^2$? Just need a hint to get started.

Thanks