下册2.2 第3课时二次函数y=a（x-h）2+k的图象与性质-2020-2021学年九年级全一册初三数学【名师学案】（北师大版）

!"#$%&'( ! !" )%)* +,-. #%# !! ! % "# ! 78ÇÈ 9 '+ ! 8=> " " ;< """"""""""""""""""""""" " " " " " " " " " " " " " " " " " " " " " " " " " " " """""""""""""""""""""""" " " " " " " " " " " " " " " " " " " " " " " " " " " # ## # &*É-'( !! �¶¿m 9 '+ # 8=> $ " ;< 3f&ÓQÏÐ/ ! # ( " ) $ ! ! 120/ ! ); 8'> ! & � + 3 6 � ! |»Ç ! B ! ! � 8 !0 ( ! � ! 9 ' 8 &b|P·R ! � 8 ! 3 ( ! � ! 9 ' 8 &b|Pb| ! � 8' ! ( ! � ! 9 ! ¾ ! � ! s ! / ! ) ! & � + 0 6 � ! |»Ç ! F ! ! � 8 !3 ( ! � ! 9 ' 8 &b|P·R ! � 8 !0 ( ! � ! 9 ' 8 &b|Pb| ! � 8' ! ( ! � ! 9 !¾ ! È ! s ! / ! ) ! ! "! �¶¿m 9 '+ # 8=> $ " ;< &3f��0V/ { 9 '+8 " 'ÉPA ! Ì'É¥÷A ") _ ! ± ! � ! E ! ! ù ! ± ! È ! E ! ! * S>9 9 '8 " Ç _'É " F^��úN>A !! 9 '8 * 2* !! ! : ÇÈ'É ! F^�&úN>A !! 9 ' # 8.# $ * 2* ! ! $ !"# ! ! z�.� 9 '+ $ 8=> & " &Y0M)* !! J'e�8ÏÐÑK ! �¶¿m 9 '+ # 8=> $ " &3 f�¨/ # 3 $ % ! ( ! ) ! * "! S>9 9 '=/ # 8;" $ " &120£ÓQ=d/ # " $ %! �9 8'" £ # " ! 6 $ (! �9 8'" £ # =" ! 6 $ )! �9 8'=" £ # =" ! 6 $ *! �9 8'=" £ # " ! 6 $ #! ¿m 9 '= # 8=! $ " ! ��\ !!!! � ! 9 ' 8 &b |P·R ! # " $ %!8 3 6 (!8 0 6 )!8 3 ! *!8 0 ! $! 6S>9 9 '"8 " Çù'É"F^��`&S>9 &úN>/ ! 9 '* # 82# $ * ! ------------------------ . . . . . ------------------------ - - - - - ! !! é�3 9 '+ # 8=> $ " O§p#ë 9 '+8 " ±çN °'­ 4 > 4 Fgh+w ! ]'­RìOÍÎ> "' ç° '­Ë¶Ë) ! çê°6 ( ! $ !"# " ! z � . � 9 '+ $ 8=> & " ;< & Y 0 P )* /! S>9 9 '" # 8=! $ " ;" ÓQÏÐ/ # 0 $ %! # ! ! " $ (! # =! ! " $ )! # ! ! =" $ *! # =! ! =" $ ,! {�¶¿m 9 '" # 8=# $ " ;! �; # 3 $ %! Ì3f&|»Ç� (! Ì3f&120A�9 8'=# )! ̾|sA ! *! � 8 0 # � ! 9 ' 8 &b|P·R 5! ! !" " => # 6S>9 9 '8 " Çù'É " F^� ! :Ç�'É / F^� ! 'É�N�·S>9&Ü¿ >A # 0 $ %4 9 ' # 8;" $ " =/ (4 9 ' # 8;" $ " ;/ )4 9 ' # 8=" $ " =/ *4 9 ' # 8=" $ " ;/ +! : ; S > 9 I 3 N O ! M � 8 !0 * ! � ! 9 ' 8 & b | P b | & � 8 ! 3 * ! � ! 9 ' 8 & b |P·R ! 7! :;�¶¿m 9 '= # 8=! $ " ;$ ! # ! $ ¡ÄÜ«Q� ! JNt&I3ÏÐÑKìÿHF �¶¿m&3f & # " $ �ª3f7ÿ� 9 AÍm� 8 &�s(y ! , !# # $ �ÍEF ! 8 , .# ) # * 1 , 9 , ) 1 + 1 ) , # * $ Epp� ! b 9 <�¢c 8 2!ÙE1< ! .# 0 8 0 1 . . . . . . . . . . . . . .