We are required to determine the electric field given an electric potential function.

We need to recall the relationship between electric field and potential.

$\overline{){\mathbf{E}}{\mathbf{=}}{\mathbf{-}}\frac{\mathbf{\u2206}\mathbf{V}}{\mathbf{\u2206}\mathbf{x}}}$

The electric potential along the *x*-axis is *V *= 100*e ^{-}*

**Part A**

What is *E** _{x}* at

**Part B**

What is *E** _{x}* at

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