# Least Squares problem with minimize solution

### Least Squares problem with minimize solution

The partial derivatives of $||Ax||^2$ with respect to $x_1......x_n$ fill the vector $2A^TAx$.
The derivatives of $2b^TAx$ fill the vector $2A^Tb$.

So the derivatives of $||Ax - b||^2$ are zero when ______?

Am I correct?

zollen

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