Let's find the inflection points, we'll need to solve the equation for this
dx2d2f(x)=0(the second derivative equals zero),
the roots of this equation will be the inflection points for the specified function graph:
dx2d2f(x)=the second derivative2((2x+1)2δ(x2+x−2)+sign(x2+x−2))=0Solve this equationSolutions are not found,
maybe, the function has no inflections