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QveST [7]
3 years ago
7

If a is an integer, which of the 

Mathematics
1 answer:
sweet [91]3 years ago
5 0
So to work this out we need to find the 4th root of each of those and pick the one that gives an integer.

A: \sqrt[4]{1.6*10^1^1} = 632.455... This is a decimal therefore <em>not</em> an integer.

B: \sqrt[4]{1.6*10^1^2} =1124.682... Again a decimal, therefore <em>not </em>an integer.

C: \sqrt[4]{1.6*10^1^3} =2000 This is a whole number, so it <em>is </em>an integer.

D: \sqrt[4]{1.6*10^1^4} =3556.558... Decimal, therefore <em>not </em>an integer

E: \sqrt[4]{1.6*10^1^5} =6324.555... Again a decimal, <em>not</em> an integer.

The only one that gives an integer when put to the 4th root is C, therefore:

1.6*10^1^3 could be A^4, as the 4th root of it is an integer.

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