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Treat it as product of multiple functions of X. Take derivative by product rule. Not too many books explaining this due to it's triviality. But you can check almost any matrix book having differential and integral chapter for reference.

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2Â¥: Originally posted by zaq123321 at 2015-01-01 22:22:50
Treat it as product of multiple functions of X. Take derivative by product rule. Not too many books explaining this due to it's triviality. But you can check almost any matrix book having differentia ...

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