let W be a subspace of n , and let x be a vector in n . 4 Prove that projW (projW (x)) projW (x).

- - -~elatims ckf A cetcal_iut &1'1 X -~ y l~Dt Suh>er of _j(xf_ - If &I lf)f P-.,_e_2av _xoAd '_cce_{aJe.tlC xiJ fxetAplei - l-eJ.-(::qI__le- elaJs.r5Q/h~ ucLA v~ alL tk d£qs,e.h~h !--~ _UGLA - - - fu relQ~o X(Zlf~.ere xG'K Ch"J " ~ r ,5 fhe._r:loo/VI - WhtUe_cIee.v 15_he':9;Jf-~ - - '--- The- iflvef)0~ CL £JtC.) is a relab#Cl4 f'kMple 2 - Lek-X:: q(( Ut£ sludelliL oC-cLA --~ - lh.e.relaiio-x~V wh~ :X1 E-X_ 1S 1F- ~ X olld-- art £-,'Sl&O(L__t;ceook - - --- -- !\ retahof\.2C\.II MeM