1.3 全称量词与存在量词-【创新方案·高中同步创新课堂】2020-2021学年高中数学选修2-1（北师大版）

$!H$(")!"*"*)*&*)")&  ")-&'Ó")&)*"*)*&*'Yk % 3$ 2ÁÂ&¿À,-'$3% 2¿À&ÁÂ,-! (#)!"&'1'!»'-./1&(&'""'4 1& &'!( "# »'-./1 ÕÖ ×Ø'1& !# '! )! »'-./1 ÕÖ×Ç'Yk-./1" "# )1" !+ ' Ó 1" !+ ) "-./1" " # ! Yk% 3$ 2¿À&ÁÂ,-'$3% 2ÁÂ&¿À,-! :12 !;<!H$(¿À¾)º$)-"»'(")4")%-"*º5(# »'(5)45-45-")%5-"(%-")'45)"»HN �!6 3 (5'" (5 ) %5(%-") %5-"(%-") )%(%%&4%%")'²+(5,"��G�! (Á¾)º5)"»'(")4")%'$* º5(#»'(5)45-45-")%5-"(%-")! !"%%&4%%"'Ykº5(#»' (5'" (5 ) % 5(%-") %5-"(%-") )%'L� ��G�+(5,2Ù�"%! J (# (" )% (%-") %'$ )%'²%-"4%'$'Ú�$)-"! Û°L�'$)-"3G�+(5,"��G�2¿Â,-! !=>?@" "!HI$O"#-("'""&2¨©" !' R()(#-%'&'²-#'('#! ¹º(&(-#'#)»'('&'L�"#-("'""&2¨©" !'J&� §"#-("'""&2¨©" !2¿Â,-3-#'('#! JK$-#'('# #!HI$¼45'""45(5&"' ).(5'")(' 5(5'") # ,"5(' 5(5-") # , (5&"' ).,5'("&(5&"' ).,(&4,'("&!!KG�+45, "×ØG�2¿Â,-3,(&4,'("&! JK$,(&U,'("& $!LM$(")¿À¾$0(+'&' /()*#-%(+"&' + ( '&! /�Ï("#'*"'+)&\�:jG�! Ü�Ï("#'*"'+)&2�:�À±"""'"#' R""!"#) + ( '& ' /9ÝÞß�Ï("#'*"'+)&\9:P�;9:à�! (#)Á¾$09ÝÞß�Ï("#'*"'+)&\9:P�;9:à �'/()*#-%(+"&'""!"#) + ( '& ' /(+'&! J9ÝÞß�Ï("#'*"'+)&\9:P�;9:à�2¿Â, -3(+'&! :1A !;<!H$¼"#-%("'$(#'&4('&�$('"'(' Yk%$$('"'('²©F 1)+"*$('"'(,! ¼"#-"-+$&�6#$"$$' Yk$$-#$"$$'²©F 2)+"*-#$"$$,! !"/$)/%'Yk%)$'Yk 102' Yk $((-#' ($$' ('+ & )- #$ $('&' Yk(2áâãä3 - # $ '! )& ! !=>?@" "!H$¼"#-%("'$(#'&4("&�('"'$(' Yk%$('"'$('²©F 1)+"*('"'$(,! ¼"#-"-+$&�6#$"$$' Yk$$-#$"$$'²©F 2)+"*-#$"$$,! !"/%)/$'Yk$)%'Yk 201' Yk $(($' ($-#')(&1! ("+ & #!H$¼"#-%("'$(#'&4('&�$('"'(! Yk%$$('"'('²©F 1)+"*$('"'(,! ¼"#'$"$&�6$$"$&' Yk$$-$$"$&'²©F 2)+"*-$$"$&,! !"/$)/%'Yk%)$'Yk 102' Yk $((-$' ($&' ('+ & )-"$('&! Yk(2áâãä3!-"'&)! !$!*+,-'./,- !)*+!,-./" !#"!"#"!$%$åæ9:'¤ç'è:! "##!$%$éêë:ãä�2Qì ¤ç! #!"#"!$%$&5'01!3íîïÆð%Y\&2¤�01'7? @¥"%ñT�2Q�2QG&%3�G&! "##!$%$&5'¥"è9:�G%&3��G! "#$!$%$01$2?@$Y\2UVW%\òóô'3*01! &#"!(")4\!]^!(#)]_`a! #!(")3b!!^O!(#)cd`a! $!e_A#!]_A# 1#"!(")#!(#)#!($)#!#!,!$!(! %!e_A#!(!fg"&!'"#'#"'*(& !345!6789" :1" !;<!H$(")(*)õ¤�Æð%åæ&'($)ö&õ\Æð' Ó7l÷3Y\Pø�ì2ù�%3PUVW! J(")($)(*)"¤�01*(#)(%)(+)"ú�01'À±õ\ñTÆ ð%\û&#%ñT&#%ñT&! !=>?@" "!̂ 5!)#(#,801%í