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Diketahui dan . Maka, adalah ....

Pertanyaan

Diketahui begin mathsize 14px style straight f open parentheses straight x minus 4 close parentheses equals 3 straight x plus 6 end style dan begin mathsize 14px style straight g open parentheses 2 straight x minus 4 close parentheses equals negative 4 straight x plus 8 end style. Maka, begin mathsize 14px style open parentheses straight f ring operator straight g close parentheses open parentheses straight x close parentheses end style adalah ....

  1. begin mathsize 14px style negative 6 straight x minus 12 end style

  2. begin mathsize 14px style negative 6 straight x plus 6 end style

  3. begin mathsize 14px style negative 6 straight x plus 18 end style

  4. begin mathsize 14px style negative 12 straight x plus 30 end style

  5. begin mathsize 14px style negative 12 straight x plus 42 end style

A. Rizky

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Pembahasan

Pertama, kita cari begin mathsize 14px style straight f open parentheses straight x close parentheses end style dan begin mathsize 14px style straight g open parentheses straight x close parentheses end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell straight f left parenthesis straight x minus 4 right parenthesis end cell equals cell 3 straight x plus 6 space end cell row blank equals cell 3 straight x minus 12 plus 18 space end cell row blank equals cell 3 left parenthesis straight x minus 4 right parenthesis plus 18 space end cell row cell straight f left parenthesis straight x right parenthesis end cell equals cell 3 straight x plus 18 space space end cell row cell straight g left parenthesis 2 straight x minus 4 right parenthesis end cell equals cell negative 4 straight x plus 8 space end cell row blank equals cell negative 2 left parenthesis 2 straight x minus 4 right parenthesis space end cell row cell straight g left parenthesis straight x right parenthesis end cell equals cell negative 2 straight x end cell end table end style

Sehingga

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses straight f ring operator straight g close parentheses open parentheses straight x close parentheses end cell equals cell straight f open parentheses straight g open parentheses straight x close parentheses close parentheses end cell row blank equals cell straight f open parentheses negative 2 straight x close parentheses end cell row blank equals cell 3 open parentheses negative 2 straight x close parentheses plus 18 end cell row blank equals cell negative 6 straight x plus 18 end cell end table end style 

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Diketahui dan . Maka, nilai p yang memenuhi dari adalah ....

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