# Four-derivative expression help

1. Homework Statement
I need to take the derivative of this expression explicitly

2. Homework Equations
$$\partial_{\mu}Ae^{(-i/\hbar)x\bullet p}u(p)$$

3. The Attempt at a Solution
I tried to take the derivative of it by taking the derivatives of components of the momentum four vector "p".
However, I got stuck while trying to recombine the expression left from derivation.

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## Answers and Replies

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1. Homework Statement
I need to take the derivative of this expression explicitly

2. Homework Equations
$$\partial_{\mu}Ae^{(-i/\hbar)x\bullet p}u(p)$$

3. The Attempt at a Solution
I tried to take the derivative of it by taking the derivatives of components of the momentum four vector "p".
However, I got stuck while trying to recombine the expression left from derivation.
$$\partial_{\mu}Ae^{(-i/\hbar)x\bullet p}u(p) =Ae^{(-i/\hbar)x\bullet p}u(p)[-i\hbar\partial_{\mu}(x^{\nu}p_{\nu})]$$,
which should be easy.

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thanks a lot!