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For what value of k are the points (k...

For what value of `k` are the points `(k ,2-2k),(-k+1,2k)a n d(-4-k ,6-2k)` collinear?

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Consider the given points.
`(-{k}+1,2 {k}),({k}, 2-2 {k}),(-4-{k}, 6-2 {k})`
Since, these points are collinear.
...
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