Find parametric equations given point and two planes

getty102
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Homework Statement



Find the parametric equations through point (5,-1,3) parallel to the line of intersection between 2x-y+z=1 and 6x-y-z=3, where 0≤t≤1

Homework Equations


1. Find normal vectors for both planes
2. Take cross product of both normal planes
...


The Attempt at a Solution


normal to plane 1 is <2,-1,1>
normal to plane 2 is <6,-1,-1>

cross product to both normal vectors is (1+1)i-(-2+6)j+(-2+6)k
=2i-4j+4k=<2,-4,4>

I wasn't sure how to input the point or if I am on the right track?
 
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You're on the right track. What do the parametric equations for a line generally look like?
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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