!"#$%&'()*+, 2 3 4 2 2 x x y x − + = − !"#$% &'(%)$*( + ,)*$ -.)*/!#$0 ., 1"2 !3(4(%563 !"# $%&'()*+ "2#(% 2-7 2 2 2 3 1 1 1 1 1 y m x x y m x − + = + + = + + 1"2 #(% 27 ( ) ( ) 1 5 25 log 5 1 .log 5 5 2 1 x x m + + + = + !"#$ &'()*+ " 8#5$%93#:7 2 2 64 9 x y + 6;#(% 2# -,:*-& 939'(%)*)96 1*9 1" /!$%93<(%5 1 x y z : 1 1 2 d = = $ 2 1 2 : 1 x t d y t z t = − − = = + =$0 .(%,- $- 1 >"2 - $?- 1 (%5? $%8#5@7 0x y z− + = $-?6 2 !"#-$%&'()*+ "..#! 2 0 ln e x xdx 1 $AB(%'C$B(DE,>!# ''F(%> + #,.G(D !"#-$&'()*+ >>-(%,D7H>H6 3 4 +7 3 3 3 3 3 3 3a b b c c a+ + + + + ≤ I5(3, J ðỀ THI 116 http://esnips.com/web/chyputy . #,.G(D !"#-$&'()*+ >>-(%,D7H>H6 3 4 +7 3 3 3 3 3 3 3a b b c c a+ + + + + ≤ I5(3, J ðỀ THI 116 http://esnips.com/web/chyputy