$\"\"$

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The first order differential equation is $\"\"$ .

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$\"\"$

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$\"\"$

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Apply integration on each side.

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$\"\"$

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$\"\"$

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Let $\"\"$ then $\"\"$ .

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

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Apply the formula $\"\"$ .

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$\"\"$

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

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$\"\"$ .

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$\"\"$

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$\"\"$ .