\"\"

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The function is \"\"

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Let \"\"

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\"\"                       (Apply the derivative)

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\"\"                          (Rewrite the expression)

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\"\"                    (The derivative power rule)

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\"\"                     (Rewrite the expression)

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\"\"                   (Multiply each side by negative one)

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\"\"  (Substitute \"\" and \"\")

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\"\"

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\"\"                            (The integral exponential rule)

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\"\"                         (Substitute \"\")

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\"\"

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\ \