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Diketahui dan , maka tentukan

Pertanyaan

Diketahui begin mathsize 14px style g open parentheses x close parentheses equals 4 x minus 3 end style dan begin mathsize 14px style open parentheses f ring operator g close parentheses open parentheses x close parentheses equals 12 x minus 8 end style, maka tentukan begin mathsize 14px style f open parentheses x close parentheses equals... end style

Pembahasan Soal:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses f ring operator g close parentheses open parentheses x close parentheses end cell equals cell 12 x minus 8 end cell row cell f open parentheses g open parentheses x close parentheses close parentheses end cell equals cell 12 x minus 8 end cell row cell f open parentheses 4 x minus 3 close parentheses end cell equals cell 12 x minus 8 end cell end table end style

Kita misalkan

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row y equals cell 4 x minus 3 end cell row cell 4 x end cell equals cell negative y minus 3 end cell row x equals cell fraction numerator negative y minus 3 over denominator 4 end fraction end cell end table end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell f left parenthesis 4 x minus 3 right parenthesis end cell equals cell 12 x minus 8 end cell row cell f left parenthesis y right parenthesis end cell equals cell 12 left parenthesis fraction numerator negative y minus 3 over denominator 4 end fraction right parenthesis minus 8 end cell row cell f left parenthesis y right parenthesis end cell equals cell negative 3 y minus 9 minus 8 end cell row cell f left parenthesis y right parenthesis end cell equals cell negative 3 y minus 17 end cell row cell f left parenthesis x right parenthesis end cell equals cell negative 3 x minus 17 end cell row blank blank blank end table end style

Jadi, begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell f left parenthesis x right parenthesis end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank minus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 3 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank x end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank minus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 17 end table end style  

 

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 13 Maret 2021

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