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Domain fungsi f ( x ) = x 2 − 2 x + 1 x 2 − 4 ​ ​ adalah ...

Domain fungsi  adalah ...

  1. begin mathsize 14px style x less or equal than negative 2 space atau space x greater or equal than 2 end style 

  2. begin mathsize 14px style x less or equal than negative 2 space atau space 1 less than x less or equal than 2 end style 

  3. begin mathsize 14px style x less or equal than negative 2 space atau space 1 less or equal than x less or equal than 2 end style 

  4. begin mathsize 14px style negative 2 less or equal than x less than 1 space atau space x greater or equal than 2 end style 

  5. begin mathsize 14px style negative 2 less or equal than x less or equal than 1 space atau space x greater or equal than 2 end style 

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E. Dwi

Master Teacher

Mahasiswa/Alumni Universitas Sriwijaya

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah A.

jawaban yang tepat adalah A.

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Pembahasan

Diketahui fungsi , maka: Fungsi akan terdefinisi untuk . Sehingga, domain fungsi adalah . Jadi, jawaban yang tepat adalah A.

Diketahui fungsi begin mathsize 14px style f left parenthesis x right parenthesis equals square root of fraction numerator x squared minus 4 over denominator x squared minus 2 x plus 1 end fraction end root end style, maka:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell f left parenthesis x right parenthesis end cell equals cell square root of fraction numerator x squared minus 4 over denominator x squared minus 2 x plus 1 end fraction end root end cell row cell f left parenthesis x right parenthesis end cell equals cell square root of fraction numerator x squared minus 4 over denominator left parenthesis x minus 1 right parenthesis squared end fraction end root end cell end table end style

Fungsi begin mathsize 14px style f end style akan terdefinisi untuk begin mathsize 14px style x squared minus 4 greater or equal than 0 end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell x squared minus 4 end cell greater or equal than 0 row cell x squared end cell greater or equal than 4 row x greater or equal than cell square root of 4 end cell row x greater or equal than cell plus-or-minus 2 end cell end table end style

Sehingga, domain fungsi begin mathsize 14px style f left parenthesis x right parenthesis equals square root of fraction numerator x squared minus 4 over denominator x squared minus 2 x plus 1 end fraction end root end style adalah begin mathsize 14px style D subscript f equals open curly brackets x space left enclose x less or equal than negative 2 space atau space x greater or equal than 2 end enclose close curly brackets end style.

Jadi, jawaban yang tepat adalah A.

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