I need help with the step-by-step process of how to derive the formula for variance.
First I need to see how to calculate E[X^2] and then how to get variance using Vax[X] = E[X^2] - (E[X])^2.
I'm pretty sure I'm doing something wrong with the integration of x^2*ab/(b+x)^a+1 and the algebra that follows.
I've been trying this for 2 days now and I cannot seem to get it.
I've posted a picture of my attempt so you can see what I'm expecting.
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