I think I'm having a brain freeze. I'm trying to determine grad f where f(x) = 1/2 x(adsbygoogle = window.adsbygoogle || []).push({}); ^{T}Qx + q^{T}x. I can get to the point where df = (x^{T}Q + q^{T})dx, but I don't know how to get to the final result grad f = Qx + q.

Can someone explain it?

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# Gradient function using matrix notation

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