Chapter 10, Problem 10.35E

For an unbound (or “free”) particle having mass $m$ in the complete absence of any potential energy (that is, $V=0$), the acceptable one-dimensional wavefunctions are $\Psi =A{e}^{i{\left(2mE\right)}^{1\text{/}2}x\text{/}h}+B{e}^{-i{\left(2mE\right)}^{1\text{/}2}x\text{/}h}$, where $A$ and $B$ are constants and $E$ is the energy of the particle. Is this wavefunction normalizable over the interval $-\infty <x<+\infty$? Explain the significance of your answer.