Problem 3: Explain why this fact is true: if A is any m × n real matrix, and ē; is the jth standard basis vector in R", then Aē; is the jth column vector of A.

Linear Algebra: A Modern Introduction
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Section6.6: The Matrix Of A Linear Transformation
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Problem 3: Explain why this fact is true: if A is any m × n real matrix, and ē; is the jth
standard basis vector in R", then Aē; is the jth column vector of A.
Transcribed Image Text:Problem 3: Explain why this fact is true: if A is any m × n real matrix, and ē; is the jth standard basis vector in R", then Aē; is the jth column vector of A.
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