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Pertanyaan

Hasil pemangkatan dari ( a 4 9 ​ ÷ a 4 3 ​ ) − 5 = ....

Hasil pemangkatan dari 

  1. fraction numerator 1 over denominator a to the power of 7 space fourth root of a squared end root end fraction

  2. a squared space fourth root of a cubed end root

  3. fraction numerator 1 over denominator a squared space fourth root of a cubed end root end fraction

  4. a to the power of 7 space fourth root of a squared end root

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R. Febrianti

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Jawaban

jawaban yang benar adalah A.

jawaban yang benar adalah A.

Pembahasan

Berdasarkan sifat bilangan berpangkat yaitu maka diperoleh sebagai berikut. Berdasarkan sifat bilangan berpangkat maka Berdasarkan sifat bilangan berpangkat maka Berdasarkan sifat bilangan berpangkat maka Berdasarkan sifat bilangan berpangkat pecahan yaitu maka Jadi hasil pemangkatan dari adalah . Oleh karena itu, jawaban yang benar adalah A.

Berdasarkan sifat bilangan berpangkat yaitu a to the power of m divided by a to the power of n equals a to the power of m minus n end exponent maka open parentheses a to the power of 9 over 4 end exponent divided by a to the power of 3 over 4 end exponent close parentheses to the power of negative 5 end exponent diperoleh sebagai berikut.

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses a to the power of 9 over 4 end exponent divided by a to the power of 3 over 4 end exponent close parentheses to the power of negative 5 end exponent end cell equals cell open parentheses a to the power of 9 over 4 minus 3 over 4 end exponent close parentheses to the power of negative 5 end exponent end cell row blank equals cell open parentheses a to the power of 6 over 4 end exponent close parentheses to the power of negative 5 end exponent end cell end table

Berdasarkan sifat bilangan berpangkat open parentheses a to the power of m close parentheses to the power of n equals a to the power of m cross times n end exponent maka

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses a to the power of 9 over 4 end exponent divided by a to the power of 3 over 4 end exponent close parentheses to the power of negative 5 end exponent end cell equals cell open parentheses a to the power of 6 over 4 end exponent close parentheses to the power of negative 5 end exponent end cell row blank equals cell a to the power of 6 over 4 cross times negative 5 end exponent end cell row blank equals cell a to the power of negative 30 over 4 end exponent end cell end table

Berdasarkan sifat bilangan berpangkat a to the power of negative n end exponent equals 1 over a to the power of n comma space a not equal to 0 maka

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses a to the power of 9 over 4 end exponent divided by a to the power of 3 over 4 end exponent close parentheses to the power of negative 5 end exponent end cell equals cell a to the power of negative 30 over 4 end exponent end cell row blank equals cell 1 over a to the power of begin display style 30 over 4 end style end exponent end cell row blank equals cell 1 over a to the power of begin display style fraction numerator 28 plus 2 over denominator 4 end fraction end style end exponent end cell row blank equals cell 1 over a to the power of begin display style 28 over 4 end style plus begin display style 2 over 4 end style end exponent end cell row blank equals cell 1 over a to the power of 7 plus begin display style 2 over 4 end style end exponent end cell end table

Berdasarkan sifat bilangan berpangkat a to the power of m cross times a to the power of n equals a to the power of m plus n end exponent maka

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses a to the power of 9 over 4 end exponent divided by a to the power of 3 over 4 end exponent close parentheses to the power of negative 5 end exponent end cell equals cell 1 over a to the power of 7 plus begin display style 2 over 4 end style end exponent end cell row blank equals cell fraction numerator 1 over denominator a to the power of 7 cross times a to the power of begin display style 2 over 4 end style end exponent end fraction end cell end table

Berdasarkan sifat bilangan berpangkat pecahan yaitu a to the power of m over n end exponent equals n-th root of a to the power of m end root comma space a not equal to 0 maka

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses a to the power of 9 over 4 end exponent divided by a to the power of 3 over 4 end exponent close parentheses to the power of negative 5 end exponent end cell equals cell fraction numerator 1 over denominator a to the power of 7 cross times a to the power of begin display style 2 over 4 end style end exponent end fraction end cell row blank equals cell fraction numerator 1 over denominator a to the power of 7 cross times fourth root of a squared end root end fraction end cell end table

Jadi hasil pemangkatan dari open parentheses a to the power of 9 over 4 end exponent divided by a to the power of 3 over 4 end exponent close parentheses to the power of negative 5 end exponent adalah fraction numerator 1 over denominator a to the power of 7 space fourth root of a squared end root end fraction.

Oleh karena itu, jawaban yang benar adalah A.

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