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integrala din 1/(x+1)* Sqrt(x)

Răspuns :

∫1/(x+1)*√x dx
Notam √x=t => x=t² => dx=2tdt
∫2t dt/(t²+1)*t=se simplifica t cu t=∫2/(t²+1) dt=2∫1/t²+1 dt=2*arctg (t)+C
Si revenind la notatia initiala:
∫1/(x+1)*√x dx=2arctg√x + C