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Himpunan penyelesaian sistem persamaan   adalah ....

Himpunan penyelesaian sistem persamaan

  open curly brackets table attributes columnalign left end attributes row cell size 14px 1 over size 14px x size 14px plus size 14px 1 over size 14px y size 14px plus size 14px 1 over size 14px z size 14px equals size 14px 6 end cell row cell size 14px 2 over size 14px x size 14px plus size 14px 2 over size 14px y size 14px minus size 14px 1 over size 14px z size 14px equals size 14px 3 end cell row cell size 14px 3 over size 14px x minus size 14px 1 over size 14px y size 14px plus size 14px 2 over size 14px z size 14px equals size 14px 7 end cell end table close adalah undefined.

Nilai dari size 14px x size 14px plus size 14px 2 size 14px y size 14px plus size 14px 3 size 14px z adalah ....

  1. 0 undefined 

  2. 1 undefined 

  3. 3 undefined 

  4. 12 undefined 

  5. 14 undefined 

Jawaban:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell Permisalan colon end cell row cell space 1 over x end cell equals a row cell 1 over y end cell equals b row cell 1 over z end cell equals c row blank blank blank row blank blank cell Sehingga space persamaan space menjadi space colon end cell row cell a plus b plus c end cell equals 6 row cell 2 a plus 2 b minus c end cell equals 3 row cell 3 a minus b plus 2 c end cell equals 7 row blank blank blank row blank blank cell Eliminasi space 1 space end cell row blank blank cell fraction numerator a plus b plus c equals 6 2 a plus 2 b minus c equals 3 over denominator 3 a plus 3 b equals 9 a plus b equals 3 end fraction end cell row blank blank blank row blank blank cell Subtitusikan space end cell row cell left parenthesis a plus b right parenthesis plus c end cell equals 6 row cell 3 plus c end cell equals 6 row c equals 3 row blank blank blank row blank blank cell Subtitusikan space nilai space c space end cell row cell a plus b plus c end cell equals 6 row cell a plus b plus 3 end cell equals 3 row cell a plus b end cell equals 3 row blank blank blank row cell 3 a minus b plus 2 c end cell equals 7 row cell 3 a minus b plus 2 left parenthesis 3 right parenthesis end cell equals 7 row cell 3 a minus b end cell equals 1 row blank blank blank row blank blank cell Eliminasi space end cell row cell a plus b end cell equals 3 row cell 3 a minus b end cell equals 1 row cell 4 b end cell equals 4 row b equals 1 row blank blank blank row blank blank Subtitusi row cell a plus b end cell equals 3 row cell a plus 1 end cell equals 3 row a equals 2 row blank blank blank row blank blank blank row blank blank blank end table end style 

 

Selanjutnya akan dicari nilai begin mathsize 14px style x comma y comma z end style.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank blank row blank blank cell table row cell x equals 1 over a space space space space space space space x equals 1 half end cell cell y equals 1 over b space space space space space space space space space y equals 1 over 1 end cell cell z equals 1 over c z equals 1 third end cell end table end cell row blank blank blank row blank blank cell maka space end cell row cell x plus 2 y plus 3 z end cell equals cell 1 half plus 2 open parentheses 1 close parentheses plus 3 open parentheses 1 third close parentheses end cell row blank equals cell 3 1 half end cell row blank blank blank row blank blank blank end table end style 

 

Jadi tidak ada jawaban yang tepat pada pilihan jawaban. 

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