নিচের কোনটি অমূলদ সংখ্যা?

A √27/3

B √125/5

C ∜81/4

D ∛32/8

Solution

Correct Answer: Option A

√27/3 = √9×3/3 

=√3^2.3 /3 = 3√3/3 = √3 যা একটি অমূলদ সংখ্যা 

 3√125/5 = 3√5^3/5 = 5/5 = 1 ;  4√81/4 = 4√3^4/4 = 3/4 

এবং 5√32/8 = 5√2^5/8 = 2/8 = 1/4 

 √27/3 একটি অমূলদ সংখ্যা । 

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