# Integral Calculus

Could anyone help me integrate this?

$\int_{r_{i} }^{o} \sqrt{\frac{r}{r_{i}-r+v_{i} rr_{i} } } dr$

• v subscript i = some initial velocity r = distance r subscript i = some initial distance

• This sounds like a tricky problem, and your offered amount is not enough incentive for someone to try to figure it out!

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