Bài Tập hệ phương trình (có lời giải)

Một số bài hệ phương trình mức độ khó và lời giải

012  4568 99     0  0 1 0  0          ! ! " # $ % # & ' (  # ! ! " $ % # & ' )    9 *+,-./*012*23*204*05*67*/8*9:6;*<=>6*20=?/*@7*05*ABC*D6;*@E:C*FG*2=*60CH6*61=* AI2*J6*K0L*20>E*2M6;*N7*2O/0*60-*/P/0*20Q6;*20-R6;*23*ST*;IK*U?2*05*V08G*K0D/*2:K* N7*V0Q6;*/8*6;0C5U*AWKX*Y0-6;*S3=*V0C*AI2*ACZ=*VC56*N7*V03C*2,C[6*,3*23*A-\/**     0 0 1 0 0           ! ! ! " # # ( # ! ! ! " # ) ]^_`abc 0 0  3   d   ! " # # ( # ! " # ) ebfg   1 1hi 3 d 3 d ! "  ( ! " ) j`bkl egmnopaqaogi 456r stuvwxyyrz9  h    1  1 0             ! ! ! ! "{ # # ( # ! ! ! "{ # )   9  |b}g~b^     1    1             ! ! ! ! "{ # # ( # ! ! "{ # ) ijc    3  d  ! " ( " ) e bfg  n  h   h   1 1 1 2 2]     1 1 1 1 1 0 h         3 3 3d d d 3 3 3 3 d 3 d 3 3 3 3 d 3 3 d     ! ! "{ "{ { ! ! " " "{ # # #  # # #     ( ( (  # # # ! "{ { { { { "{ "{ { "{ "{  # # # ) ) )   bmenbfgG*X* 010  3457 89  ! " 1#0$ " "#"$ % & % & % & % & ' ( ( ( ) * + ( ( , ) * -       ./  ! 0 " 0 % & % & ( 1 ' + ( 1 - 23#"$45674 " "% & & %( ) ( , 289:;#0$4<=> ! ?% & % &( ) ( , @A;<B4>B " " " " " ? " ? " 0 ! C D " D " 0 0CE 00@ " F F F " 00 00 0 % & % & % & % & % & % %& & % & % & % & & % & % %& & & , G , G ' ' , G , G ) ) H * * ( ) ( ( ( , , I ) , I + + J ) ) K * * ( ) ( ( ( , , , ( ) - -  ALM7N 0% &) ) O4NP>QNR4RS     345 9TUVWVXYZ[\]^W      ./  0@% &( _ `aM<9b " " " " " ? 0 ?# $ D # $ 0? ? # $ 0?#c$ # $ % & % & % & % & % & % & d e ( ( ( ( , ) I ( ( ( , ) f g ( ( h i  " " " ? F# $ F ! # $ 0 " ? % & %& % & % % & ' ( ( ( ) * ( * + * ( ) * ( - 012  456789777 0  2      767897 !"#8$% 2 2 2 0   2" " 0 & " 0' " 0& ( )                *       +      , -   .  45#/6789777%0712#8$%%3%7124 576789:/;2<=>4?@7<%#A7B717C;1D5 %3%7EF%7G%0%H2<%3%7EIJ67896736K67LIJ%3%7 #MNJ9 0 0 2                 DO#PFB7Q67C RSIT73%DU3%@2%V%7GNW XYZ[\\ ][^_`aba[cdeefg[hE71678979  2 2 2  &i 0" ' ' 0) 2"        j   k l     k m [   hE9  no71%E7Kp767897#CT7H%H7MGK7@KTD 47FG 2  5 2"7 0"7#8$%2<678972K %7q%HI6%09  2  2 2  ' ' 0)" &i 2& 0" 2 2 &i &i "               +       r5s(7 0"t;uD r5vr0771p77 2 0w &  , x D r5 0y ( z z 75 " 2 2 &i &i 2&        D47p;S67897 2"#8$% 2 2 2 2 2 2 &i &i 2 &i &i 2 &i &i 'D 0) 2& 2&              { |           } ~    012 4 4 4 5 4 4 5 2 4 2 2 4 4 56 56 56 064 74 56 568 569064 2 45 2 06 06 441 5 450 06 441 450 06 06 441 441 06 06 450 !"# $%&#'() *+' , -.##'(7/0058%17/00/589 2&34#56 17. 8(.9(:;#43<=3343>>?@? $AA %B9) CDE33FB 5(1;&G(@H #'( F1#74I.!J KLMNOPQ NR#S#'3J 4 4 4 4 4 5 708 4 4 2 748 T TU U T U T U V W X W Y N R#S#J ZZ[\Z]^_`Zabcd_`Ze]f_bZghiZUjZTkUZ_bleZgmnZopnZTZo^ZUqZgnriZgjZ`snZtZUbuZevZ]weZxyeZ z_Ze{Zabcd_`Ze]f_bZ_^|Zo^Zeb}Zo^uZabcd_`Ze]f_bZ~nvZi|Z_bn_ZviZ~bnZ]weZ`_ZevZ gcsUZxyeZabcd_`Ze]f_bZTkUZZx^Z_`bnxZZZg|ZevZUh_ZxyeZ~Z__`ZeUbZ~buZ uZbd_ZZ . - 4 4 708 47 08 5 47 08 4 0 4 4 1UT T UT T T T )1F0 ;&+.()%# 0T I!9. 1 4 0 4 0 U T T )?%17748.@H 4 4 4 4 4 4 5 4 5 5 5 0 57 08 74 48 04 1 57 08 7 08 04 27 08 447 08 41 0 T T U U T U T T T T T !9. 1 2 5 2 0 2 2 2 1 2 5 0 9 2 2 T U T U '319!#';#.#S#F1#74 3CJ]u_`ZbZevZ gyZĂ|ZUbuZgnÂxZÊÔƠZƯĐăqZgcâ_`Zebê_`ZôZ|ơưZfxZgnÂxZđZebiyUZôZo^ZgnÂxZZ ebiyUZĂZvuZUbuZevxZ`nUZÊđZgri 012  45689       1  0 0  1  0          !  " #  !  " $      %& '( ' ) ) *+,-./0.1234/567189(:;<=>8<=<2 ?=/@,/A>      1  0  1  0       !    !  B CD23E5     1  0FG G G G   !  : H0IJ K (LM-.FNOGPQ': 0I K :FOGP/R?=: H0IJ K <2L8/SB/<TU*+= <280,/A>    1  0   !  *?VW+X+,/A>U*Y8/S ,?=/@E,Z     2   1 [  0  2      0 0 1 B          ! !  ! ! !  ! \  !  !          2 0 0 1 B      ] ^ \  ^   ! ^   _  `2>Sa`bB(a+c:2<d3*ae.>S3ff* 4568g hijklm8mn    2 0  B1  ' 2  B 2 o           ! ! " #   ! " $        pqrstGuvqtwtxqytz{Gt|}st~tst~sttvqst~tqystGsqttGttqtt stqystqtqzttt~rtqttstvtvt~tGq vttv¡stGq vttp¢t ~}tGst~t|t£vt¤t   %& B 2 ¥ *%¦UI 1   !  011   345678974099474  0  0    0  84      1  1   ! ! " # # $ $ % & ' ( & $ % $ )  *4+,-9.5/0   1 1     23  & 4 4 & %  5694789   1   1     : % & 4 4 & 9;7  <  = > ? @ A B     C     : % & & & D EF9G4H0 0 2  : I J % K L M N 7;730O784PQ7RST74U9V 0  ,TW  XYT4Q0O784PQ7RST74U9V 0  ,TW 4Y7V69ZO04[789\79]P7^9_P8P`P04-aP9-H77T7G4b780c7Rd78.+7 4789WZH0e74fTG4H7g4H746h ijklmn olpP`P4Qg45678974     1 q    ! ! ! ! ! " & 4 & % $ ( & 4 4 % $ ) l  pP`P *r3*.cSa]704P0`4P,+04-T  9.5/0   1 q   ! ! ! I J I J & 4 & % K L K L M N M N    1 q   0 ! ! ! ! ! = % ? I J I J ? & 4 & % ' K L K L ? M N M N % ? A  s+7.tT0H0e7RuR788P`P9P+gh vwxy z{|}w~y{yw{w~y{ywy y xyy{~yww! 