Question: Write the vector (1, 2, -1) as a linear combination (if possible) as of the vectors (-1, 2, 1), (2, 1, 4)

Write the vector (1, 2, -1) as a linear combination (if possible) 

Write the vector (1, 2, -1) as a linear combination (if possible) as of the vectors (-1, 2, 1), (2, 1, 4)

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