bài tập -11CB

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. 2   . 31 203 . 8 2+$  .! ! #!  $  (  !  +/  /4 )9:  )9: 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 MN3O! #: MN94 M!N $: MN 4& MN9 ("MN?BMN  ? +M!N1 P MN / !"M!N  01,M!N! MN 6  2,MN'M!N6  M&NMN. 3. M'>N ! #MN/.! MN "M&N #@MN?AM N   ##4MN5   MN #$MN!? #(@M> N! MN ?AM> N !A #+MN "MN  #/"MN" .!!! #0MN!.'MN    #2"M>N! $3@MN 'A,'MN (@& AP 'M!N ("M!N-'MN  (#@M!NK?@PMN  ($ 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