Question

rationalising factor of 1 / 2^2/3 + 2^1/3 + 1

Answer 1

Just try by the options bro.

Which option will remove the rational numbers completely by multiplying it to the denominator.

So let's take option (a)

(2^1/3 - 1) (2^2/3 + 2^1/3 +1) = 2 + 2^2/3 - 2^2/3 + 2^1/3 - 2^1/3 - 1

=> 2-1

=> 1

So ans is Option (a)

Now to check other options similarly you can multiply and check that rationalization is getting removed or not by multiplication like just above.

Well as there is no any other option except option (a) so this is your ans.