Đại số 7, tiết 36, năm học 010-011

§. t 36. «n tËp ch¬ng ii A        !" #$%& '() *+,,  *  /* 0 /* 1 /… +,,  23&  / 0 /  1 /… * .* +      3 1 2 * 1 2 3 y y y k x x x = = = = 1 1 2 2 2 2 3 3 * ; x y x y x y x y = =     !  !  "  "  … 1 2 2 1 * x y x y = 2 3 3 2 ; x y x y = 1 3 3 1 ; x y x y =    1 k #$  a x A §. t 36. «n tËp ch¬ng ii %&!'()#*+,-. /012345.0678. 67.0945.0: A C B  ;<=> ?@".A.678. )#767" §. t 36. «n tËp ch¬ng ii A %&"%B4@.,CD.8 E##FB.GH.IJ.0"K/ " 2L 0(-7.B1#@.,CG / ! /@45.0678. 67.09.: ;<=> ?@"K.A.67.09 )#767"K  %1# §. t 36. «n tËp ch¬ng ii A B7.8C M8C %" .ICN.2 ;67 !O"OP I;67.09 !O"OP Q/R@//SCN.: '= '(TTUIN.@/  ;)#1<TGVVU"  ;)#-R6IJ.0.TG x y z = = 2 3 5 x y z 310 = = 31 2 3 5 2 3 5 10 x 31 62 2 y =31 93 3 z 31 124 4 x y z x y z + + = = = + + => = => = => => = => = => = §. t 36. «n tËp ch¬ng ii A B7.8C  I;)#1<TGVVU"  ;)#-R6IJ.0.TG x y z = = 1 1 1 2 3 5   U VVU "      " PV VK " ! " P " "  W "W PO !  W "W O " U W " K P z = = => = §. t 36. «n tËp ch¬ng ii A B7.8C M8C!MP 0< ?#,F/XTMT%TYTQT ZT'<A.@.-4&  X Y 4 4 4 4 4 4 % Q M ' 4 Z [ ! " \ P K  ! " \ P K   ] ]!]"]\]P ] ]! ]" ]\ ]P M8C"MP"0< ?^<A._.0/,7<`#,a9/ ]OIO  ! ]  !