carlito3 carlito3
  • 16-12-2016
  • Mathematics
contestada

A number to the 8th power divided by the same number to the 5th power equals27. What is the number

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dajat dajat
  • 16-12-2016
3 is the answer. 
n^8/n^5=27 
[tex]n^3=27[/tex]
[tex] \sqrt[3]{n} = \sqrt[3]{27} [/tex]
n=3
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apologiabiology
apologiabiology apologiabiology
  • 16-12-2016
remember

[tex] \frac{x^m}{x^n}=x^{m-n} [/tex]

so

x=x
[tex] \frac{x^8}{x^5}=27=x^{8-5}=x^3 [/tex]

27=x³
take cube root or use multiplication tables
3=x

da number is 3

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