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**1. Homework Statement**

The point Q is the reflection of P(-1,3,4), in the plane with equation 2x-y+z=1.

Determine the coordinates of Q

**2. Homework Equations**

**3. The Attempt at a Solution**

Well im not really looking for a solution. I just want to know what I am trying to find. What is a reflection in three space. Where is point Q

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