2.5 直线与圆锥曲线（练案一）2020年高中同步教与学数学（人教B版选修2-1）

书书书 !"# ! $%&'()* !!" ! !"#$%&" ! ! '( " ) # '( ! !"#$%&"*+,-. !!!!!!!!!!!!!!!!!! "! !"#$% " # $%# &' $% ()&*+ ! ,% $% &-./ # ! 0' $% &1/ " !! # &!' (!% )!"* +!"# #! (23% ## # , " # $# &4*+5,% & 623%7 $ $ % 8 + ! 9 " $% " $- ! 0:;&,% & &<=/ " !! # &!" (!# )!. +!- .! ,% " $#/' >?@ # # - / " # $" A8BCD&6+ ! 0 ' & EFG " !! # &!,0 # ' # 0 (!' # 槡, 0!H'$槡0 )!' #槡 槡0 +!, 0#'#槡0 -! !"23%&IJ/ # # , " # . $"! " " # KL $ " # ! " # /M+&'NO,%&IJ % " # # L+ % " " ! " # /M+&'GPQO & 9QO ! KR'NO& ,%IJ % 9CQO ! STUVW ! 0! XY#$% # # $- " &*+ ( >+ ) " " ! * # NZ&%[>#$ %67+ $ ! \+ * /]^_+ ! 0`ab *$) &cd / ! '! \ * G]^_+ ! ( G#$% " # $# + # " + $ * # &*+ ! $ G# $%e&f+ ! %&& ($ > # ghI i & j a / '*1 ! 0 " %&& *$ " $ ! 2! !",% " $ " ,/" # #," >3% " # $,# kAfBlm+ ! K no , &pqEF ! %! \,% #,# " /.$* >23% # # , " # $. 67 $ $ % 8+ ! - +G#$% " # $#.# " . $ * # e&rsf+ ! t#$%>!", %ulm+ ! v ' $%- &cd / &wxq/槡#y!K.&q> - +&]^ ! ) ! '( ! !"#$%&"+,-.*/0 !!!!!!!!!!!!!!!!!! "! #$% # # $,# +" " + $ * # e&+>,% .#/- " ,%$* &w z{|/ " ! 0 + &q/ " !! # &! % . (!% )! % . H "*- 3 +!% H 0' 3 #! ( ) " ,# ! * # &,% & >?@ # # /# " # $# 67 - " ! - # 8+ ! % [ - " - # &M+/ - ! \,% & &-./ . " " . " ( * #! ,% *- &-./ . # ! 0 . " . # &q}7 " !! # &!# (!,# )! " # +!, " # .! M~/ " * ! * #! f*+/ ( " * !槡0 ##!�,%"$.#,#NZ' M+&�]^/ " # &?@IJ/ " !! # &! # # #0 / " # 20 $" (! # # 20 / " # #0 $" )! ## # 20 / # " # #0 $" +! ## # #0 / # " # 20 $" -! #$%&�+/_+ ! ��g/ " g ! *+O " gh�ge ! ( *+t�-a/ -01 &,%6#$%7 $ $ % 8+ ! 9 " $% " $ # ! K#$%&IJ ! ' " ' !" !!! #$ !!!!!!!!!!!!!!!!!!!!!!! %&'()*+ ! ,- " . # /0 0! !"23% # # , # , " # 0 # $" " , $ * ! 0 $ * # &4*+/ ( ! 9(+ ( t�-a/ '*1 &,%>23%&4�At�AfB6+ ! 0 �23%|~.&pqEFG " !! # &! " " ! # ( !! (! " " ! # # !! )! ) # ! / 4 # !! +! " # ! / 4 # '! \�� $$ *" # ! " # " # # $ " +! %$ *" # ! " # " # # / " " ,' # # $" + ! 9 $ ) % (* ! 0 ' &pqEFG ! 2! !"+ ) " ,# ! * #! 1 " # ! * #! �+ - ��<= " -) " , " -1 " $ 槡# #!��+-&��/2! " " # K 2 &IJ % " # # 9 $ ! % G 2 e&CD8+ ! * G]^_+ ! K %&& *$ ' %&& *% &