What is the result of ∫x+1x2+1dx\int \frac{x+1}{x^2+1} dx∫x2+1x+1dx?
12ln(x2+1)+arctanx+C\frac{1}{2} \ln(x^2+1) + \arctan x + C21ln(x2+1)+arctanx+C
ln(x2+1)+arctanx+C\ln(x^2+1) + \arctan x + Cln(x2+1)+arctanx+C
12ln(x2+1)+12arctanx+C\frac{1}{2} \ln(x^2+1) + \frac{1}{2} \arctan x + C21ln(x2+1)+21arctanx+C
ln∣x+1∣+arctanx+C\ln|x+1| + \arctan x + Cln∣x+1∣+arctanx+C