For range, fuel burn v. distance is required to be a min. value, whereas for endurance it's fuel burn v. time.
Thus for a jet aircraft, flight for range occurs at the max TAS/Drag speed, normally 1.32 Vmd.
1.32 is the fourth root of 3, incidentally. If you understand basic calculus, that is simply derived from comparing minimum values for Drag and Power, using the relationships D = A/VČ + BVČ and P=D x V, having differentiated D with respect to V and equating to zero, then the same thing for dP/dV and comparing the 2 minima.