Question

Which rational expression is equal to a positive whole number when evaluated?

2 ^1/2
8 ^1/3
12 ^1/4
15 ^1/5

Answer 1

8^1/3 8 is 2^3 so 8^1/3 = 2 The other expresssions don't give whole numbers.

Answer 2

B) 8^1/3

Explanation:

It is B) 8 ^1/3

we can write 8 as 2^3

8^1/3 = (2^3)^1/3

= 2^3/3 [3/3 = 1]

= 2^1

= 2 which is a whole number.

Answer: B) 8^1/3

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