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Jika ,maka nilai dari adalah ….

Jika begin mathsize 14px style 2 over 5 open parentheses table row cell negative sign 5 end cell 10 5 row 10 cell negative sign 15 end cell 5 row 20 25 10 end table close parentheses minus sign open parentheses table row 2 3 3 row cell negative sign 1 end cell 1 0 row 0 cell negative sign 1 end cell 3 end table close parentheses equals open parentheses table row cell negative sign 4 end cell 1 cell negative sign 1 end cell row 5 cell a minus sign 3 end cell 2 row cell b minus sign 1 end cell 11 1 end table close parentheses end style, maka nilai dari begin mathsize 14px style 2 open parentheses a and 3 b close parentheses end style adalah ….

  1. 23

  2. 27

  3. 36

  4. 46

  5. 54

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Jawaban terverifikasi

Pembahasan

Perhatikan bahwa Dari sini kita ketahui bahwa - 7 = a - 3 dan 8 = b - 1 dan Sehingga

Perhatikan bahwa

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 2 over 5 open parentheses table row cell negative sign 5 end cell 10 5 row 10 cell negative sign 15 end cell 5 row 20 25 10 end table close parentheses minus sign open parentheses table row 2 3 3 row cell negative sign 1 end cell 1 0 row 0 cell negative sign 1 end cell 3 end table close parentheses end cell equals cell open parentheses table row cell negative sign 4 end cell 1 cell negative sign 1 end cell row 5 cell a minus sign 3 end cell 2 row cell b minus sign 1 end cell 11 1 end table close parentheses end cell row cell open parentheses table row cell negative sign 2 end cell 4 2 row 4 cell negative sign 6 end cell 2 row 8 10 4 end table close parentheses minus sign open parentheses table row 2 3 3 row cell negative sign 1 end cell 1 0 row 0 cell negative sign 1 end cell 3 end table close parentheses end cell equals cell open parentheses table row cell negative sign 4 end cell 1 cell negative sign 1 end cell row 5 cell a minus sign 3 end cell 2 row cell b minus sign 1 end cell 11 1 end table close parentheses end cell row cell open parentheses table row cell negative sign 2 minus sign 2 end cell cell 4 minus sign 3 end cell cell 2 minus sign 3 end cell row cell 4 minus sign left parenthesis minus sign 1 right parenthesis end cell cell negative sign 6 minus sign 1 end cell cell 2 minus sign 0 end cell row cell 8 minus sign 0 end cell cell 10 minus sign left parenthesis minus sign 1 right parenthesis end cell cell 4 minus sign 3 end cell end table close parentheses end cell equals cell open parentheses table row cell negative sign 4 end cell 1 cell negative sign 1 end cell row 5 cell a minus sign 3 end cell 2 row cell b minus sign 1 end cell 11 1 end table close parentheses end cell row cell open parentheses table row cell negative sign 4 end cell 1 cell negative sign 1 end cell row 5 cell negative sign 7 end cell 2 row 8 11 1 end table close parentheses end cell equals cell open parentheses table row cell negative sign 4 end cell 1 cell negative sign 1 end cell row 5 cell a minus sign 3 end cell 2 row cell b minus sign 1 end cell 11 1 end table close parentheses end cell end table end style 
 

Dari sini kita ketahui bahwa -7 = 3 dan 8 = 1

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell negative sign 7 end cell equals cell a minus sign 3 end cell row cell negative sign 7 plus 3 end cell equals cell a minus sign 3 plus 3 end cell row cell negative sign 4 end cell equals a row a equals cell negative sign 4 end cell end table end style 
 

dan

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row 8 equals cell b minus sign 1 end cell row cell 8 plus 1 end cell equals cell b minus sign 1 plus 1 end cell row 9 equals b end table end style 
 

Sehingga

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 2 open parentheses a and 3 b close parentheses end cell equals cell 2 open parentheses negative sign 4 plus 3 open parentheses 9 close parentheses close parentheses end cell row blank equals cell 2 open parentheses negative sign 4 plus 27 close parentheses end cell row blank equals cell 2 open parentheses 23 close parentheses end cell row blank equals 46 end table end style  

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