Find ∫dxx2+4\int \frac{dx}{x^2+4}∫x2+4dx.
12arctan(x/2)+C\frac{1}{2}\arctan(x/2) + C21arctan(x/2)+C
arctan(x/2)+C\arctan(x/2) + Carctan(x/2)+C
14arctan(x/4)+C\frac{1}{4}\arctan(x/4) + C41arctan(x/4)+C
None