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For the multiple linear model in centered form enter image description here

prove that enter image description here

where enter image description here is the L-2 norm, defined as enter image description here

Any help would be greatly appreciated. Perhaps links to papers, chapters, websites that could help me in some way.

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  • $\begingroup$ Did you try anything at all? Where exactly did you get stuck? If you don't even know how to start, tell us what you don't understand so we can help you move along $\endgroup$ – Lucas Farias Feb 12 at 4:17

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