Let two functions and be defined for 0 x Explain why (x) x cannot be a wave function but (x) e kx (with k being a positive finite number) could be a valid wave function

Question: Let two functions and be defined for 0 x . Explain why (x) = x cannot be a wave function but

Let two functions ψ and Φ be defined for 0 ≤ x ≤ ∞. Explain why ψ(x) = x cannot be a wave function but Φ(x) = e −kx (with k being a positive finite number) could be a valid wave function.

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