Chapter 6, Problem 81P

A force given by F = b/ $\sqrt{x}$ acts in the x-direction, where b is a constant with the units N·m^l/2. Show that even though the force becomes arbitrarily large as x approaches zero, the work done in moving from x₁ to x₂ remains finite even as x₁ approaches zero. Find an expression for that work in the limit x₁ → 0.