Đề_HD Toán TN Phan Châu Trinh

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$,L ,L ,) Q D P n u n   = = − −   r r r  v$‚)GFb@a`hR v$i j )G   , , x y t z t = −   = +   = −  $ R∈ ) -d -d -d -d $&#'() +<cT$i)ƒC&#'($LJLb)8.0:*G $LL ) D u = − r hC0G $ L ,L,)AM = − − uuuur 8. „ L … $,L L ) D u AM = − − r uuuur ( )      †„ L …† -$ ) † † , $ ) $ )   $ ) J  , H D D u AM d M D u = + − + − = + + − = = r uuuur r -d -d -d -d *+:5 $-&#'() C0G ∆ jRb,db#C?(3‡5fC#Fh@#DC ∆ jG $Fh@#)  Rb,db#   ,d   x y xy − = −  ⇔  = −   i&0C# #&<W‡5fC#P.Gb$bH#)-bH# 7;<=>?0C##Y(G`  R,bJ#8.`  Rh# -d -d -d . TRƯỜNG THPT PHAN CHÂU TRINH   !"#$%&#'() *+$,-&#'() *.("/ 