3.1 不等关系与不等式（学案一）2020年高中同步教与学数学（人教B版必修5）

书书书 !"# ! $ ! % ! & !"# ! !"#$%!"& !"#"# ! !"#$%!"& ! # '( " !"#$%& ! '%&() ! *+(,- ! .*+'%/0 ! 1'%&2(3# ! 45*+'6%/0 " 3&78)&9 "# : ;)+ ! <=>3?:='6@A $% #'B ! 3&C)&DEF +'GHI=>3 ! JKLMNOG>3?,P ! :QRSTU =V3WXYZ+[?\]+^ & !" _L`a !!!!! b$%cdefghijklEF=g mnoL`g " "" JK $ " # ! pgm ' $$# (' $%! (' $%# ( =q !!!!! &" #" rs % ! & # ' !' !%! ( " $ ' "%! ( " =q? !!!!! c # '#!%" " & $!!!! ) !%"(& $!!! ) !%" % & $!!! # )# t ! " " ! ! u " " & v ! # ! !!! " ) u " % & v ! # ! !!! "# )*+, ! !"&%!"#$ !! !"#$ !! wxyz{| ! <U5}~F�,����w�L`=� � ! ��'%�Z ! ��'%�] ! �+�������O�� � ! ��L`�� # J��Id=�� ! ����=��` ! �# L`��=�w # !! %&'() !! ' ! ( �#L`a ' % ! " ! & ! ' ! ( ( =gm ! noL`g # ' " ( _ # % % � # " % hi=L`gn ¡L`g ) _ # & % � # ' % hi=L`gn¢ ¡L`g # rs$%L`g ! JK£' %=¤¥�Zs¦¥ ! �£'%=¤¥�]s¦¥ ! O§=$% L`gnI¨L`g # J " $ ' % ( " & ' % ( © ' ' % ( " ( ' % ( ?I¨L` g ) $ ' % ( & & ' % ( © ' ' % ( & ( ' % ( ª?I¨L`g # rs$%L`g ! JK'%L`g=¤¥Zs¦¥ ! «1' %L`g=¤¥]s¦¥ ! ¬­O$%L`gn®¨L`g # J " $ ' % ( " & ' % ( © ' ' % ( % ( ' % ( ?®¨L`g ) $ ' % ( & & ' % ( © ' ' % ( ' ( ' % ( ª?®¨L`g # -. ! !"# ! ' " $% ! ! &'("' " "# )*+,- ! ! " " ( !(" "# ".' ! ! !/' " "# 0 ! " " ( !(" 123456 # 7 ! ' " 56 # !"# ! & " $% ! ! /'("' " "# )*+,- ! ! % " ( !(" "# ".' ! ! !&' " "# 0 ! % " ( !(" 123456 # 7 ! & " 56 # !! *+,- !! # / # $ ! ' ! ( u %() v ! % ' ) ?¯�° & ' " ( u % '槡"v!% 槡( "?¯'±�°& ' # ( t % ' ! ² % & ! ! %(! ?¯'±�° & 01 ! 89 ! ' " : ! & " ;4<=>*+?@ # 23 ! ' ! ( �° )' " ( L'± )' # ( '± # 4567 ! ! ' " AB;CDE ! " " ( ! ( " # # 8&9: # $ ! # ³´µ'a % © # ¶·¸a % ¹&º» ! ¼� ½cr¾J¿e ! Àbe¡ÁÂÃÄ # Å�Æ ) Ç�Æ )* È�É' Êv� ( º»Ë� + ³´µ 'a ' ! ( '#* "#+' !!' !,# ¶· ¸a ' " ( "&& #)& *& ,,*& ! * " Z] ¾Ì ) ! " ) " )*+; ! <=>?@A !! !"#$ !! !# cÍ�=xcZ]ÎÏJÐ & "# $%xcJоÌZ] & RSÑÒ?Ó­ & !! %&'() !! !# rsÔÕ$%xc ! C " ! w !(" ! ! " " ! ! % " Ö×�� | ! #²Ø#'×���° # ÙÚÛÜÖ×��ÝÞÕß¿àÆ " ' ! ( xcá©cÍ�=Æá��''rÝ # ' " ( cÍ�=ÔÕ$Æ| ! ¦¥ÆrÝ=xc¾¤¥ÆrÝ =xcZ # ' # ( Æ , CÆ - wcÍ�=âã��#Ö× "' - ( Æ , CÆ - äå )' . ( Æ , wÆ - =¦æ )' / ( Æ , wÆ - =¤æ # "# ç ! !