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Hasil pemangkatan dari ( m 3 2 ​ n 1 4 3 ​ ​ ) 4 adalah ....

Hasil pemangkatan dari  adalah 

  1. m n cubed space root index 6 of m squared n cubed end root

  2. open parentheses m n close parentheses cubed space root index 6 of m squared n cubed end root

  3. m squared n to the power of 7 space cube root of m squared end root

  4. m squared n to the power of 7 space cube root of m squared n 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.

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Pembahasan

Ingat maka diperoleh sebagai berikut. Berdasarkan sifat bilangan berpangkat yaitu maka Pecahan campuran dapat diubah menjadi pecahan senilai sebagai berikut. Sehingga diperoleh Berdasarkan sifat bilangan berpangkat maka diperoleh sebagai berikut. Pecahan dapat dijadikan pecahan dengan penyebut sama yaitu berpenyebut KPK dari yaitu maka Berdasarkan sifat bilangan berpangkat pecahan yaitu maka diperoleh Jika dapat difaktorkan menjadi dengan bilangan berpangkat maka dapat disederhanakan sehingga Jadi h asil pemangkatan dari adalah . Oleh karena itu, jawaban yang benar adalah A.

Ingat n-th root of a to the power of m end root equals open parentheses a to the power of m close parentheses to the power of n comma space a not equal to 0 maka square root of m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent end root diperoleh sebagai berikut.

square root of m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent end root equals open parentheses m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent close parentheses to the power of 1 half end exponent

Berdasarkan sifat bilangan berpangkat yaitu 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 square root of m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent end root close parentheses to the power of 4 end cell equals cell open parentheses open parentheses m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent close parentheses to the power of 1 half end exponent close parentheses to the power of 4 end cell row blank equals cell open parentheses m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent close parentheses to the power of 1 half cross times 4 end exponent end cell row blank equals cell open parentheses m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent close parentheses squared end cell end table

Pecahan campuran 1 3 over 4 dapat diubah menjadi pecahan senilai sebagai berikut.

table attributes columnalign right center left columnspacing 0px end attributes row cell 1 3 over 4 end cell equals cell fraction numerator 1 cross times 4 plus 3 over denominator 4 end fraction end cell row blank equals cell fraction numerator 4 plus 3 over denominator 4 end fraction end cell row blank equals cell 7 over 4 end cell end table

Sehingga diperoleh

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses square root of m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent end root close parentheses to the power of 4 end cell equals cell open parentheses m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent close parentheses squared end cell row blank equals cell open parentheses m to the power of 2 over 3 end exponent n to the power of 7 over 4 end exponent close parentheses squared end cell end table

Berdasarkan sifat bilangan berpangkat open parentheses a cross times b close parentheses to the power of m equals a to the power of m cross times b to the power of m maka diperoleh sebagai berikut.

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses square root of m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent end root close parentheses to the power of 4 end cell equals cell open parentheses m to the power of 2 over 3 end exponent n to the power of 7 over 4 end exponent close parentheses squared end cell row blank equals cell open parentheses m to the power of 2 over 3 end exponent close parentheses squared open parentheses n to the power of 7 over 4 end exponent close parentheses squared end cell row blank equals cell m to the power of 2 over 3 cross times 2 end exponent n to the power of fraction numerator 7 over denominator begin display style stack up diagonal strike 4 with 2 below end style end fraction cross times up diagonal strike 2 end exponent end cell row blank equals cell m to the power of 4 over 3 end exponent n to the power of 7 over 2 end exponent end cell end table

Pecahan 4 over 3 space text dan end text space 7 over 2 dapat dijadikan pecahan dengan penyebut sama yaitu berpenyebut KPK dari 3 space text dan end text space 2 yaitu 6 maka

table attributes columnalign right center left columnspacing 0px end attributes row cell 4 over 3 end cell equals cell fraction numerator 4 cross times 2 over denominator 3 cross times 2 end fraction end cell row blank equals cell 8 over 6 end cell row cell 7 over 2 end cell equals cell fraction numerator 7 cross times 3 over denominator 2 cross times 3 end fraction end cell row blank equals cell 21 over 6 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 maka diperoleh 

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses square root of m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent end root close parentheses to the power of 4 end cell equals cell m to the power of 4 over 3 end exponent n to the power of 7 over 2 end exponent end cell row blank equals cell m to the power of 8 over 6 end exponent n to the power of 21 over 6 end exponent end cell row blank equals cell m to the power of 8 cross times 1 over 6 end exponent n to the power of 21 cross times 1 over 6 end exponent end cell row blank equals cell open parentheses m to the power of 8 n to the power of 21 close parentheses to the power of 1 over 6 end exponent end cell row blank equals cell root index 6 of m to the power of 8 n to the power of 21 end root end cell end table

Jika n-th root of a dapat difaktorkan menjadi n-th root of p cross times q end root dengan p space text atau end text space q bilangan berpangkat n maka n-th root of a dapat disederhanakan sehingga

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses square root of m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent end root close parentheses to the power of 4 end cell equals cell root index 6 of m to the power of 8 n to the power of 21 end root end cell row blank equals cell root index 6 of m to the power of 6 cross times m squared cross times n to the power of 18 cross times n cubed end root end cell row blank equals cell m to the power of 6 over 6 end exponent n to the power of 18 over 6 end exponent root index 6 of m squared n cubed end root end cell row blank equals cell m to the power of 1 n cubed root index 6 of m squared n cubed end root end cell row blank equals cell m n cubed root index 6 of m squared n cubed end root end cell end table

Jadi hasil pemangkatan dari open parentheses square root of m to the power of 2 over 3 end exponent n to the power of 1 3 over 4 end exponent end root close parentheses to the power of 4 adalah m n cubed space root index 6 of m squared n cubed end root.

Oleh karena itu, jawaban yang benar adalah A.

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