Tiê ́ t 21 !"#$%&' ()**+)* Ho ̣ va ̀ tên :………………………. Lơ ́ p :8 ,- & ./ ,0'-(1 2 34'5 67% (8',- & !9$ : ,- 6;1 (1 0'< 06= ') >?@$A B)>?@CB>?D(B)>?"EB)>?D : ,)- 6;1 (1 0'< 06= ' @>+)$ @>?)$A B 43 2 + x CB 43 2 − x (B 49 2 − x EB 49 2 + x : ,@,- F 67 8 $'% ( $( (0'< 0C,- 9 ,G1 B ( ) 22 2 yxyx −=− CB ( ) 22 2 yxyx +=+ (B ( ) ( ) 22 22 abba −−=− EB )?@C$ @C+)$H 22 49 ab − : ,!2/ ,>H*"6'= 8, 67, (1 C,- 16'I ( 2510 2 +− xx C% 8 B***CB****(B*)"EB**)" : ,"- 6;1 (1 0'< 06= ' xyyx 4:2 3 A B+ yx 2 2 1 CB yx 2 2 (B yx 2 4 1 EB yx 3 2 1 : ,D,- F 67 8 $'% ( $( (J'% 89, 'G1 B ( ) ( ) 33 abba −=− CB ( ) ( ) 22 xyyx −=− (B ( ) 81262 23 3 +++=+ xxxx EB ( ) 32 3 3311 xxxx −−−=− :34'5 6I A15 D9$ : , 9$1 68 C,- 16'I ( ( )( ) ( ) 2 333 −−+− xxx : ,) )9$4'56= ('( (96'I (G16' ''56I B yxyx 55 22 +−− CB yxyx 121233 22 +−− := @ )9$. &6= '(', ( ) ( ) 1:23 2234 −++−− xxxxx : ,! 9$('I 8&,'7% 8 22 2 +− xx K*F/ ,& ,> Ba ̀ i la ̀ m : ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… ……………………………………………………………………………………… …………………………………………………………………………………… BIÊ ̉ U ĐIÊ ̉ M CHÂ ́ M A/ Phần trắc nghiê ̣ m : ( 4đ) Ba ̀ i 1: 0,5đ Ba ̀ i 2 : ( 0,5đ) Ba ̀ i 3: (1đ) Ba ̀ i 4: (0,5đ) Ba ̀ i 5: (0,5đ) Ba ̀ i 6:( 1đ ) B/ Phần tư ̣ luâ ̣ n : ( 6đ) Ba ̀ i 1 : (1đ) Ba ̀ i 2: ( 2đ) Ba ̀ i 3 : (2đ) Ba ̀ i 4 ( 1đ) (B −