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## Homework Statement

## Homework Equations

## The Attempt at a Solution

for part a I do not know how to write it in power series form ?

for part b :

I chose the perturbed H' is v(x)= (1+ε )K x^2 /2

then I started integrate E_1 = ∫ H' ψ^2 dx

the problem was , the result equals to ∞ !!

shall I integrate in the interval [ 0,∞ ] !

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