Evaluating the Integral ∫ sqrt(x) / x^2 + x dx on the interval [1/3, 3]

[@MasterWuMathematics]

To clarify, at 6:00, when I say "unit circle geometry", I meant these triangles are derived from the Unit Circle. Links to reference videos: 1. Integral of 1/(a^2 + x^2): kzbin.info/www/bejne/jpqWeJeBhbBpaas 2. Why sin(30˚) equals 1/2: kzbin.info/www/bejne/sJe4pGmfi5loa9E

[@profealonsoibarra3803]

Excelente.