Hint -
1. Try plotting y as f(x)? What is the range it takes?
2. Can you find the cdf for y? i.e. Prob (y<y0)
3. Differentiate the cdf to get pdf
This should not be too tough
Let X be a Uniform(0,1) random variable. Find the pdf of Y = (-1/lamda)*ln(X) , where lamda is a given positive number.
I don't think this is very difficult, but I'm not really sure how to go about it when X and Y are together like that. If anyone could point me in the right direction I'd really appreciate it!