let be an matrix. For each let denote the jth column of B. Prove that:

, where is the jth standard vector of

so far all I have is:

is this correct?

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- April 20th 2008, 09:51 PMlllllLinear Transformation Question
let be an matrix. For each let denote the jth column of B. Prove that:

, where is the jth standard vector of

so far all I have is:

is this correct?