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 derivative3x+12(−3x+16x+1+(3x+1)29(x2−1))=0Solve this equationSolutions are not found,
maybe, the function has no inflections