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1. The problem statement, all variables and given/known data

Show, using the linear combination method, that the vectors below are non-coplanar or independent. Be complete

d= [2,-1,-2], e=[1,1,1] , and f = [1,-5,8]

2. Relevant equations

Ok so I'm assuming, I am supposed to use Cramer's Rule here. But the problem is I don't fully understand it.

3. The attempt at a solution

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# Homework Help: Linear Combination Method

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