$\"\"$

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The function is $\"\"$ .

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Boundary condition is $\"\"$ .

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The above equation is in the form of linear equation $\"\"$ .

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$\"\"$ and $\"\"$ .

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The integrating factor is $\"\"$ .

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Substitute $\"\"$ in the above integrate formula.

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$\"\"$

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Power rule of integral: $\"\"$ .

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$\"\"$ .

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$\"\"$

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The implies that the general solution is

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$\"\"$ .

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Substitute $\"\"$ in the above equation.

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$\"\"$

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$\"\"$ .

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$\"\"$

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Substitute $\"\"$ in the above integral function.

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$\"\"$

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$ .