jloading7262 jloading7262
  • 25-09-2018
  • Mathematics
contestada

Diego says that if you cube the number 4 and then take the cube root of the result, you end up with 8. Is diego correct?

Respuesta :

pinquancaro pinquancaro
  • 04-10-2018

Consider the cube of the number 4,

[tex]4^3 = 4 \times 4 \times 4 = 64[/tex]

Now, we have to take the cube root of the result obtained which is 64.

So, [tex](64)^\frac{1}{3} = (4 \times 4 \times 4)^\frac{1}{3}[/tex]

[tex](64)^\frac{1}{3} = (4^3)^\frac{1}{3}[/tex]

[tex](64)^\frac{1}{3} = (4)^{3 \times \frac{1}{3}}[/tex]

[tex](64)^\frac{1}{3} = 4[/tex]

Therefore, the cube root of 64 is 4.

But Diego evaluated the result as 8, which is incorrect.

Therefore, Diego is incorrect.

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