Logo SHub
hint-header

10 đề thi chất lượng giữa học kỳ 2 Toán 9

Mô tả

S S G G I I O O D D C C V V O O T T O O T T H H I I B B N N H H _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ [ [ 1 1 ] ] N N T T P P K K I I M M T T R R A A C C H H T T L L N N G G G G I I A A H H C C K K I I I I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ M M N N T T H H I I : : T T O O N N 9 9 T T h h i i g g i i a a n n l l m m b b i i : : 1 1 2 2 0 0 p p h h t t ( ( k k h h n n g g k k t t h h i i g g i i a a n n p p h h t t ) ) B B i i 1 1 . . ( ( 2 2 , , 0 0 i i m m ) ) . . C C h h o o p p h h n n g g t t r r n n h h 2 ( 3) 5 0 x m x ( ( 1 1 ) ) , , m m l l t t h h a a m m s s . . 1 1 . . C C h h n n g g m m i i n n h h p p h h n n g g t t r r n n h h c c h h o o l l u u n n l l u u n n c c h h a a i i n n g g h h i i m m t t r r i i d d u u . . 2 2 . . T T m m m m p p h h n n g g t t r r n n h h c c h h o o c c h h a a i i n n g g h h i i m m 1 2 , x x t t h h a a m m n n a a ) ) 1 2 , x x . . b b ) ) 1 2 3 4 11 x x . . c c ) ) B B i i u u t t h h c c 1 2 Q x x t t g g i i t t r r n n h h n n h h t t . . B B i i 2 2 . . ( ( 2 2 , , 0 0 i i m m ) ) . . 1 1 . . T T h h e e o o k k h h o o c c h h h h a a i i t t c c g g i i a a o o s s n n x x u u t t 6 6 0 0 0 0 s s n n p p h h m m t t r r o o n n g g m m t t t t h h i i g g i i a a n n n n h h . . D D o o c c i i t t i i n n k k t t h h u u t t n n n n t t I I s s n n x x u u t t v v t t m m c c k k h h o o c c h h 1 1 8 8 % % v v t t I I I I s s n n x x u u t t v v t t m m c c k k h h o o c c h h 2 2 1 1 % % . . V V v v t t t t r r o o n n g g c c n n g g t t h h i i g g i i a a n n q q u u y y n n h h h h a a i i t t h h o o n n t t h h n n h h v v t t m m c c 1 1 2 2 0 0 s s n n p p h h m m . . T T n n h h s s s s n n p p h h m m c c g g i i a a o o c c a a m m i i t t t t h h e e o o k k h h o o c c h h . . 2 2 . . G G i i i i h h p p h h n n g g t t r r n n h h 3 3 4 2 8 0 80 96 0. x y x y B B i i 3 3 . . ( ( 2 2 , , 0 0 i i m m ) ) . . C C h h o o p p a a r r a a b b o o l l ( ( P P ) ) : : 2 y x v v n n g g t t h h n n g g : 2 d y x , , ( ( P P ) ) c c t t d d t t i i h h a a i i i i m m p p h h n n b b i i t t A A , , B B . . 1 1 . . T T n n h h d d i i o o n n t t h h n n g g A A B B v v d d i i n n t t c c h h t t a a m m g g i i c c O O A A B B , , v v i i O O l l g g c c t t a a . . 2 2 . . T T m m a a y x a c c t t ( ( P P ) ) t t i i h h a a i i i i m m p p h h n n b b i i t t C C , , D D s s a a o o c c h h o o C C D D = = A A B B . . 3 3 . . T T m m t t m m v v t t n n h h b b n n k k n n h h n n g g t t r r n n n n g g o o i i t t i i p p t t a a m m g g i i c c O O A A B B . . B B i i 4 4 . . ( ( 3 3 , , 5 5 i i m m ) ) . . C C h h o o n n a a n n g g t t r r n n ( ( O O ; ; R R ) ) , , n n g g k k n n h h A A B B , , K K l l i i m m c c h h n n h h g g i i a a c c u u n n g g A A B B . . T T r r n n c c u u n n g g K K B B l l y y m m t t i i m m M M ( ( M M k k h h c c K K , , B B ) ) . . T T r r n n t t i i a a A A M M l l y y i i m m N N s s a a o o c c h h o o A A N N = = B B M M . . K K d d y y B B P P s s o o n n g g s s o o n n g g v v i i K K M M , , Q Q l l g g i i a a o o i i m m c c a a A A P P v v i i B B M M , , E E l l g g i i a a o o i i m m c c a a B B P P v v A A M M . . 1 1 . . C C h h n n g g m m i i n n h h P P Q Q M M E E l l t t g g i i c c n n i i t t i i p p . . 2 2 . . C C h h n n g g m m i i n n h h h h a a i i t t a a m m g g i i c c A A K K N N , , B B K K M M b b n n g g n n h h a a u u v v A A M M . . B B E E = = A A N N . . A A Q Q . . 3 3 . . G G i i R R , , S S l l n n l l t t l l g g i i a a o o i i m m t t h h h h a a i i c c a a Q Q A A , , Q Q B B v v i i n n g g t t r r n n n n g g o o i i t t i i p p t t a a m m g g i i c c O O M M P P . . C C h h n n g g m m i i n n h h k k h h i i M M d d i i n n g g t t r r n n c c u u n n g g K K B B t t h h t t r r u u n n g g i i m m I I c c a a R R S S l l u u n n n n m m t t r r n n m m t t n n g g c c n n h h . . B B i i 5 5 . . ( ( 0 0 , , 5 5 i i m m ) ) . . T T h h s s i i n n h h c c h h c c l l a a c c h h n n m m t t t t r r o o n n g g h h a a i i ( ( 5 5 . . 1 1 h h o o c c 5 5 . . 2 2 ) ) . . 1 1 . . G G i i i i p p h h n n g g t t r r n n h h 9 9 9 x x x x . . 2 2 . . C C h h o o b b a a s s d d n n g g x x , , y y , , z z . . C C h h n n g g m m i i n n h h 2 2 2 3 27( ) 4( ) x y y z z x xyz x y z . . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - H H T T - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ C C n n b b c c o o i i t t h h i i k k h h n n g g g g i i i i t t h h c c h h g g t t h h m m . . H H v v t t n n t t h h s s i i n n h h : : ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ; ; S S b b o o d d a a n n h h : : ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . . . .S S G G I I O O D D C C V V O O T T O O T T H H I I B B N N H H _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ [ [ 2 2 ] ] N N T T P P K K I I M M T T R R A A C C H H T T L L N N G G G G I I A A H H C C K K I I I I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ M M N N T T H H I I : : T T O O N N 9 9 T T h h i i g g i i a a n n l l m m b b i i : : 1 1 2 2 0 0 p p h h t t ( ( k k h h n n g g k k t t h h i i g g i i a a n n p p h h t t ) ) B B i i 1 1 . . ( ( 1 1 , , 5 5 i i m m ) ) . . C C h h o o h h p p h h n n g g t t r r n n h h 3 3, 2 6. x y a x y ( ( a a l l t t h h a a m m s s ) ) . . 1 1 . . G G i i i i h h p p h h n n g g t t r r n n h h k k h h i i 4 a . . 2 2 . . T T m m a a h h p p h h n n g g t t r r n n h h c c n n g g h h i i m m d d u u y y n n h h t t ( ( x x ; ; y y ) ) s s a a o o c c h h o o a a ) ) 2 3 2 0 x y . . b b ) ) i i m m M M ( ( x x ; ; y y ) ) t t h h u u c c n n g g p p h h n n g g i i c c g g c c p p h h n n t t t t h h I I I I c c a a h h t t a a . . B B i i 2 2 . . ( ( 1 1 , , 0 0 i i m m ) ) . . H H a a i i t t s s n n x x u u t t c c n n g g m m a a y y m m t t l l o o i i o o . . N N u u t t t t h h n n h h t t m m a a y y t t r r o o n n g g 3 3 n n g g y y , , t t t t h h h h a a i i m m a a y y t t r r o o n n g g 5 5 n n g g y y t t h h i i c c h h a a i i t t m m a a y y c c 1 1 3 3 1 1 0 0 c c h h i i c c o o . . B B i i t t r r n n g g t t r r o o n n g g m m t t n n g g y y , , t t t t h h n n h h t t m m a a y y c c n n h h i i u u h h n n t t t t h h h h a a i i 1 1 0 0 c c h h i i c c o o , , h h i i m m i i t t t t r r o o n n g g m m t t n n g g y y m m a a y y c c b b a a o o n n h h i i u u c c h h i i c c o o ? ? B B i i 3 3 . . ( ( 2 2 , , 0 0 i i m m ) ) . . C C h h o o p p a a r r a a b b o o l l ( ( P P ) ) : : 2 2 y x v v n n g g t t h h n n g g : 4 2 d y x a b , , O O l l g g c c t t a a . . 1 1 . . C C h h n n g g m m i i n n h h i i m m 2 ( ; 1) M m m k k h h n n g g t t h h t t h h u u c c p p a a r r a a b b o o l l ( ( P P ) ) v v i i m m i i m m . . 2 2 . . T T r r o o n n g g t t r r n n g g h h p p ( ( P P ) ) v v d d t t i i p p x x c c n n h h a a u u t t i i i i m m N N , , t t n n h h d d i i o o n n t t h h n n g g O O N N . . 3 3 . . K K h h i i 2 8 a b , , t t m m h h a a i i i i m m E E , , F F t t n n g g n n g g t t h h u u c c ( ( P P ) ) v v d d s s a a o o c c h h o o d d i i E E F F n n g g n n n n h h t t . . B B i i 4 4 . . ( ( 1 1 , , 5 5 i i m m ) ) . . C C h h o o p p h h n n g g t t r r n n h h 2 2( 2) 2 0 mx m x m ( ( m m l l t t h h a a m m s s ) ) . . 1 1 . . T T m m i i u u k k i i n n c c a a m m p p h h n n g g t t r r n n h h c c h h a a i i n n g g h h i i m m p p h h n n b b i i t t . . 2 2 . . T T m m m m p p h h n n g g t t r r n n h h c c h h a a i i n n g g h h i i m m p p h h n n b b i i t t 1 2 , x x t t h h a a m m n n 1 2 1 2 3( ) 4 5 x x x x . . B B i i 5 5 . . ( ( 3 3 , , 5 5 i i m m ) ) . . C C h h o o n n g g t t r r n n ( ( O O ; ; R R ) ) , , t t i i m m A A n n m m n n g g o o i i n n g g t t r r n n k k h h a a i i t t i i p p t t u u y y n n A A B B , , A A C C v v i i n n g g t t r r n n , , B B v v C C l l h h a a i i t t i i p p i i m m . . T T B B k k n n g g t t h h n n g g s s o o n n g g s s o o n n g g v v i i A A C C c c t t ( ( O O ) ) t t i i D D , , D D k k h h c c B B . . n n g g t t h h n n g g A A D D c c t t ( ( O O ) ) t t i i E E ( ( E E k k h h c c D D ) ) . . 1 1 . . C C h h n n g g m m i i n n h h t t g g i i c c A A B B O O C C n n i i t t i i p p v v 2 . AE AD AB . . 2 2 . . C C h h n n g g m m i i n n h h CEA CEB . . 3 3 . . G G i i s s O O A A = = 3 3 R R , , t t n n h h k k h h o o n n g g c c c c h h g g i i a a h h a a i i n n g g t t h h n n g g A A C C , , B B D D t t h h e e o o R R . . B B i i 6 6 . . ( ( 0 0 , , 5 5 i i m m ) ) . . T T h h s s i i n n h h c c h h c c l l a a c c h h n n m m t t t t r r o o n n g g h h a a i i ( ( 6 6 . . 1 1 h h o o c c 6 6 . . 2 2 ) ) . . 1 1 . . T T m m t t t t c c c c c c g g i i t t r r k k p p h h n n g g t t r r n n h h s s a a u u c c n n g g h h i i m m 2 2 4 4 6 2 2 5 x k x k k x x x . . 2 2 . . G G i i i i h h p p h h n n g g t t r r n n h h 3 2 (3 2 ) 8, ( 3 3) 4. x y xy y y - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - H H T T - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ C C n n b b c c o o i i t t h h i i k k h h n n g g g g i i i i t t h h c c h h g g t t h h m m . . H H v v t t n n t t h h s s i i n n h h : : ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ; ; S S b b o o d d a a n n h h : : ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... . . . .

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