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Pertanyaan

Tentukan hasil akar-akar bilangan berikut ! d. 5 4 ​ + 3 4 6 ​ e. 9 3 ​ − 3 2 7 2 ​ f. 3 8 2 ​ + 3 − 12 5 4 ​

Tentukan hasil akar-akar bilangan berikut !

d.
e.
f.

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A. Salim

Master Teacher

Mahasiswa/Alumni Universitas Pelita Harapan

Jawaban terverifikasi

Jawaban

hasil dari , , dan .

hasil dari square root of 5 to the power of 4 end root plus cube root of 4 to the power of 6 end root equals 41, square root of 9 cubed end root minus cube root of 27 squared end root equals 18, dan cube root of 8 squared end root plus cube root of negative 125 to the power of 4 end root equals 629.

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Pembahasan

Ingatlah, jika hasil pemangkatan , maka nilai . Berdasarkan hal tersebut, maka: d) e) f) Dengan demikian, hasil dari , , dan .

Ingatlah, jika hasil pemangkatan a to the power of n equals b, maka nilai n-th root of b equals n-th root of a to the power of n end root equals a.

Berdasarkan hal tersebut, maka:

d)

table attributes columnalign right center left columnspacing 0px end attributes row cell square root of 5 to the power of 4 end root plus cube root of 4 to the power of 6 end root end cell equals cell square root of open parentheses 5 squared close parentheses squared end root plus cube root of open parentheses 4 squared close parentheses cubed end root end cell row blank equals cell 5 squared plus 4 squared end cell row blank equals cell 25 plus 16 end cell row blank equals 41 end table

e)

table attributes columnalign right center left columnspacing 0px end attributes row cell square root of 9 cubed end root minus cube root of 27 squared end root end cell equals cell square root of open parentheses 3 squared close parentheses cubed end root minus cube root of open parentheses 3 cubed close parentheses squared end root end cell row blank equals cell square root of open parentheses 3 cubed close parentheses squared end root minus cube root of open parentheses 3 squared close parentheses cubed end root end cell row blank equals cell 3 cubed minus 3 squared end cell row blank equals cell 27 minus 9 end cell row blank equals 18 end table

f)

table attributes columnalign right center left columnspacing 0px end attributes row cell cube root of 8 squared end root plus cube root of negative 125 to the power of 4 end root end cell equals cell cube root of open parentheses 2 cubed close parentheses squared end root plus cube root of open parentheses negative 5 cubed close parentheses to the power of 4 end root end cell row blank equals cell cube root of open parentheses 2 squared close parentheses cubed end root plus cube root of open parentheses open parentheses negative 5 close parentheses to the power of 4 close parentheses cubed end root end cell row blank equals cell 2 squared plus open parentheses negative 5 close parentheses to the power of 4 end cell row blank equals cell 4 plus 625 end cell row blank equals 629 end table

Dengan demikian, hasil dari square root of 5 to the power of 4 end root plus cube root of 4 to the power of 6 end root equals 41, square root of 9 cubed end root minus cube root of 27 squared end root equals 18, dan cube root of 8 squared end root plus cube root of negative 125 to the power of 4 end root equals 629.

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