! Mục tiêu chương IV !"#$#%&' ()* +,&--'.'/"-'.'- +,&--*%01/"#*%01--*%012 3$ 4.*%01-5 6.7 "#$%& ''() Khái niệm89:;-%,%< .-% - = >-" ?%@',A'):;:0 % B2 8 C9:; D9 1E='A&FGH D9( 'A&FIH D9:; FJH C9 -:; D9%- D9:5" FGHKFIH89%L FIHKFJH89%&2 #*+,()-.(/0 D9MN'E/:%&. D98 C9%&2 C9$ C9O D9MN-4:0:; D98C9'A& C9 & "#1*+)2& P8*-;Q;R !"#$#%&-STUBN : /." %9V * GV W$8T,"X !1&"4" )YZ IV 83Q;R#.1E%< R "#1#$*+)2&/34 DV *%< W$ T4G8[Y\ ] 4 >,%,"X-"F^H T4I8[Y\ ] '_ `-> >[,%,"X-2 FB9H T4J83$ ,.\ ^-B9>Y\ ] >; '_ -,;$N: * aI*QV V 8 T4G83$-">" 8^bcd T4I83$-2 8B9b`Ccd T4J89-"--2 %< > :V '),)N : -"* D3$: _E8 e: _Ebf$C=_E aIIg&.()* *"A'E :$'< %-%&V$-/( 28-1 /( 4A& g()*A'E :&2 WL-%& -$ *hA' '\ " :;-%"1 :0 L.$'\ :0-/( 2 B/( .1&i"_ ' * aI9'.' • ^.'/" • ^.'- • ^.'> • ^.'/( > • ^.'> • ^.'/( > D^.'/"8j-/:%&1/( ' STUB." "i"_ $ D^.'-8j-/:%&1/( .=O2L" i"_ W>-$ aIJ91&:kl &'.'/" GB%&2. %8m:' -( - >' )'.'/"." ' -- 4 IB%&2.8 [n/ 1E=L-M -" :"o&STUB : JeN." 'E$'\ 8g" ->N:l 4-> L/,'E$'\ - )'.'/"- @ a" >:08"_:0:;." - " >)'.'/"." - : aIa91&:l &'.'- Bp'Z ' V8g" >p'Z 1' V - )'.'-- j?;1'E$'\ -,.-:'$ "#"#$5+4()-672089:; qP8 f*%01/" n i"_ $-,Ag12@' "Y> -124' ?'4&-?1FSTUBH T3$ E *%01/" DP8f E *%01/"\ %lL'M12' ='4&-?1FSTUBH/"12Gr nsjdbL'M12' STUB 9( N/,nsj nsj3bd;cFtH d;cFtHD`bnt%&STUB aaIf*F*%01-HDn`j qP8f*%01/" Dn i"_ -$-,A Dg12@' STUBY> -124' =O2 LFSeH <#=4) P8f E *%01/"\ %lL'M12' =O2LFSeH/STUB12Gr >?) n`j3bL'M12' SeuL'M12' STUB 9T-=N "_ 9%&( ))-." q Bp'Z u2L8vravrwvr B2 -:8xvvvvvvxvvvvvvxvvvvvv F?GvrHvIvvvvvvavvvvvv [2Lk\ xvvvvvvJvvvvvvGvvvvvv B2 -:--:>xvvvvvvxvvvvvvxvvvvvv j?'4&-?1GvvvvvvGvvvvvvGvvvvvv j?1F'bGvrHvIvvvvvavvvvv j?'4&Gvvvvvvwvvvvvyvvvvv B&=" FavrHavvvvvJIvvvvIavvvv j?&FSqBHyvvvvvawvvvvJyvvvv B='EO2LywGw Bp'E2LGIrGyrJyrB&Q[n F 2L-xvzu2LH +?1;$='E2LFSeH-p= 'E2' '\ DS%_ :Ivr; *wvvvvvz DS%_ :yvr; *avvvvvz %B{/&:l'E#?1=;RV:l &-&Se/STUB12| "#"#@5+A!( Khái niệm8j-" i"_ :*%01/"-*%01-' OA- M =2( . R "#1#$*+)2&/3 4 DV *%< W$ T 4 G8[Y ] 4 >,%,"X-"F^H T 4 I8[Y ] '_ `->. * aI*QV V 8 T 4 G83$-">" 8^bcd T 4 I83$-2 8B9b`Ccd T 4 J89-"--2. !1&" 4 " )YZ IV 83Q;R#.1E%< R "#1#$*+)2&/3 4 DV