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OpenStudy (anonymous):
what's the derivative of this matrix (b'X'Xb) where b is a vector
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OpenStudy (anonymous):
I mean the derivative with respect to b
OpenStudy (anonymous):
it's 2X'Xb
OpenStudy (anonymous):
what is the question stated in words?
OpenStudy (anonymous):
what's the derivative with respect to b of this matrix (b'X'Xb) where b is a vector
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