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Pertanyaan

Jika , maka nilai x yang memenuhi adalah ....

Jika begin mathsize 14px style straight f open parentheses straight x close parentheses equals negative 1 over straight x comma straight x not equal to 0 end style , maka nilai x yang memenuhi begin mathsize 14px style open parentheses straight f ring operator straight f ring operator straight f ring operator straight f ring operator straight f close parentheses open parentheses straight x close parentheses equals negative 2 end style adalah ....

 

  1. size 14px minus size 14px 2 

  2. size 14px minus size 14px 1 

  3. begin mathsize 14px style 1 end style 

  4. undefined 

  5. size 14px 2 

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I. Roy

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalahD.

jawaban yang tepat adalah D.

Pembahasan

Perhatikan bahwa Sehingga Dengan sifat , maka Jadi, jawaban yang tepat adalahD.

Perhatikan bahwa

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses straight f ring operator straight f close parentheses open parentheses straight x close parentheses end cell equals cell straight f open parentheses straight f open parentheses straight x close parentheses close parentheses end cell row blank equals cell straight f open parentheses negative 1 over straight x close parentheses end cell row blank equals cell negative fraction numerator 1 over denominator open parentheses negative 1 over straight x close parentheses end fraction end cell row blank equals cell negative fraction numerator 1 over denominator negative 1 over straight x end fraction end cell row blank equals straight x row blank equals cell straight I open parentheses straight x close parentheses 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 f ring operator straight f ring operator straight f ring operator straight f close parentheses open parentheses straight x close parentheses end cell equals cell negative 2 end cell row cell open parentheses straight f ring operator straight f ring operator straight f ring operator open parentheses straight f ring operator straight f close parentheses close parentheses open parentheses straight x close parentheses end cell equals cell negative 2 end cell row cell open parentheses straight f ring operator straight f ring operator straight f ring operator straight I close parentheses open parentheses straight x close parentheses end cell equals cell negative 2 end cell row cell open parentheses straight f ring operator straight f ring operator open parentheses straight f ring operator straight I close parentheses close parentheses open parentheses straight x close parentheses end cell equals cell negative 2 end cell end table end style 

Dengan sifat  undefined  , maka

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses straight f ring operator straight f ring operator open parentheses straight f ring operator straight I close parentheses close parentheses open parentheses straight x close parentheses end cell equals cell negative 2 end cell row cell open parentheses straight f ring operator straight f ring operator straight f close parentheses open parentheses straight x close parentheses end cell equals cell negative 2 end cell row cell open parentheses straight f ring operator open parentheses straight f ring operator straight f close parentheses close parentheses open parentheses straight x close parentheses end cell equals cell negative 2 end cell row cell open parentheses straight f ring operator straight I close parentheses open parentheses straight x close parentheses end cell equals cell negative 2 end cell row cell straight f open parentheses straight x close parentheses end cell equals cell negative 2 end cell row cell negative 1 over straight x end cell equals cell negative 2 end cell row cell 1 over straight x end cell equals 2 row straight x equals cell 1 half end cell end table end style 

Jadi, jawaban yang tepat adalah D.

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