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OCR Stats 3 help?

The object distance, U, and the image distance, V, for a concave mirror are related to the focal distance, f, by the formula
1/u +1/v = 1/f
U is a random variable uniformly distributed over the interval from 2f to 3f. Show that V is distributed with probability density function
f/((v-f)^2)
and state the range of corresponding values for V. Obtain the mean and median of V.

Ive done up to the range, getting the range to be between 3f/2 and 2f but i dont know how you would get the mean or median?
Hiya! I noticed that you haven't received any responses yet. You might have better luck posting in the maths forum. You can find it here - http://www.thestudentroom.co.uk/forumdisplay.php?f=38

Good luck! :smile:

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