2.2 一次函数和二次函数（练案一）-2020年高中同步教与学数学（人教B版必修1）

书书书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`@L ( # \ ( *a]bV ! ' " ' !" !!! #$ !!!!!!!!!!!!!!!!!!!!!!! %&'()*+ ! ,- " . # /0 !!!!! ! &"#$'()*+, ! " -. " "! &' " ! # " &# # +.)#+# I ! $ 3 # / " cde # ) ) *a]bV # ! !! " )!) & % *!) ' % ,!) & $% -!) ' $% #! !"&' $ &# # +&#+* #$f&' # )&' $ &*#+&$" g 6hH ! !! " )! ! ( # " " *! ! " # ( " ,! ! ( # $" " -! ! $" # ( " %! &' $ &)# # +&# F $ &)#+& ! )& ( ( " */0ij#1/2* ! !! " .! &' " ! # " &# # +&#+* # ( " ! $" " & " ! % "# ) ! !! " )! " ! " " # * # " ! $" " *! " ! " " $ * $ " ! $" " ,!* # " ! $" " # " ! " " -!* $ " ! $" " $ " ! " " '! !"C%&' $ &)# # +&#+* */0*kHTU. ! # # $" "# F $ MGHTU. ! ( # "" "# ) ! !! " )!)&" # &&$. # *&$"" *!)&% # &&"# # *&"" ,!)&% # &&$/ # *&"" -!)&% # &&$"# # *&"" /! 34&' " ! # " &# # +&#+* Nlmn' + op " ! #++ " & " ! # $+ "# ;< ! !! " )! " ! # " $ " ! " " $ " ! . " *! " ! " " $ " ! # " $ " ! . " ,! " ! # " $ " ! . " $ " ! " " -! " ! . " $ " ! # " $ " ! " " 0! &' $ &$# # +.#$# ! ( ' # ' % " *]q# ! !! " )!# *! % $# # " & ,! % $# # # & -! % " # # & 1! &' $ &$# # $#)# ! ( ' # ' " " *r@]# ) # # )n' ) *a] bV# ! !! " )!( ' ) ' " *!( ' ) ' # ,!$# ' ) ' ( -!$" ' ) ' ( 2! =s[- # # +)#+" & ( NL$t # % ( # ! & " # Wu