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## Homework Statement

f(x)=(1/2)*(x^T)*(A)*(x)-(x^T)*(b)

Show that the gradient of f(x) is (1/2)*[((A^T)+A)*x]-(b)

where x^transpose is transpose of x and A^transpose is transpose of A.

Note: A is real matrix n*n and b is a column matrix n

## Homework Equations

## The Attempt at a Solution

I need to kinda proof that.