Suppose that {x1, x2, x3} is a linearly independent set of vectors in a vector space V . Must {x1, x1 + 3x2, x1 + 3x2 + 5x3} be a linearly independent set of vectors? Explain.

Elementary Linear Algebra (MindTap Course List)
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Chapter4: Vector Spaces
Section4.CR: Review Exercises
Problem 78CR: Let v1, v2, and v3 be three linearly independent vectors in a vector space V. Is the set...
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Suppose that {x1, x2, x3} is a linearly independent set of vectors in a vector space V .
Must {x1, x1 + 3x2, x1 + 3x2 + 5x3} be a linearly independent set of vectors? Explain. 

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