Find the general solution to y′=1/(x2+1)y' = 1/(x^2+1)y′=1/(x2+1).
y=arctanx+Cy = \arctan x + Cy=arctanx+C
y=tanx+Cy = \tan x + Cy=tanx+C
y=1/x+Cy = 1/x + Cy=1/x+C
None