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Tentukan hasil operasi bilanganberikut! c. 2 a 3 1 ​ + 4 a 3 1 ​ + 6 a 4 3 ​ − 5 a 4 3 ​

Tentukan hasil operasi bilangan berikut!
c. 

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R. Febrianti

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Jawaban

hasil dari adalah .

hasil dari 2 a to the power of 1 third end exponent plus 4 a to the power of 1 third end exponent plus 6 a to the power of 3 over 4 end exponent minus 5 a to the power of 3 over 4 end exponent adalah table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell 6 cube root of a plus fourth root of a cubed end root end cell end table.

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Pembahasan

c. Diketahui maka berdasarkan sifat bilangan berpangkat pecahan yaitu dan sehingga diperoleh sebagai berikut. Berdasarkan penjumlahan dan pengurangan bentuk akar dengan akar pangkat sama yaitu Maka Jadi hasil dari adalah .

c. Diketahui 2 a to the power of 1 third end exponent plus 4 a to the power of 1 third end exponent plus 6 a to the power of 3 over 4 end exponent minus 5 a to the power of 3 over 4 end exponent maka 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 dan a to the power of 1 equals asehingga diperoleh sebagai berikut.

table attributes columnalign right center left columnspacing 0px end attributes row cell 2 a to the power of 1 third end exponent plus 4 a to the power of 1 third end exponent plus 6 a to the power of 3 over 4 end exponent minus 5 a to the power of 3 over 4 end exponent end cell equals cell 2 cube root of a to the power of 1 end root plus 4 cube root of a to the power of 1 end root plus 6 fourth root of a cubed end root minus 5 fourth root of a cubed end root end cell row blank equals cell 2 cube root of a plus 4 cube root of a plus 6 fourth root of a cubed end root minus 5 fourth root of a cubed end root end cell end table

Berdasarkan penjumlahan dan pengurangan bentuk akar dengan akar pangkat sama yaitu

a n-th root of b plus c n-th root of b equals open parentheses a plus c close parentheses n-th root of b a n-th root of b minus c n-th root of b equals open parentheses a minus c close parentheses n-th root of b

Maka

table attributes columnalign right center left columnspacing 0px end attributes row cell 2 a to the power of 1 third end exponent plus 4 a to the power of 1 third end exponent plus 6 a to the power of 3 over 4 end exponent minus 5 a to the power of 3 over 4 end exponent end cell equals cell 2 cube root of a plus 4 cube root of a plus 6 fourth root of a cubed end root minus 5 fourth root of a cubed end root end cell row blank equals cell open parentheses 2 plus 4 close parentheses cube root of a plus open parentheses 6 minus 5 close parentheses fourth root of a cubed end root end cell row blank equals cell 6 cube root of a plus 1 fourth root of a cubed end root end cell row blank equals cell 6 cube root of a plus fourth root of a cubed end root end cell end table

Jadi hasil dari 2 a to the power of 1 third end exponent plus 4 a to the power of 1 third end exponent plus 6 a to the power of 3 over 4 end exponent minus 5 a to the power of 3 over 4 end exponent adalah table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell 6 cube root of a plus fourth root of a cubed end root end cell end table.

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