Q. 2

Write in the form ‘nth root of a’ in each of the following numbers.

1. (81)1/4 2. (49)1/2

3. (15)1/5 4. (512)1/9

5. (100)1/19 6. (6)1/7

Answer :

1. (81)1/4


In general, a1/n is written as ‘nth root of a’.


So, (81)1/4 is written as ‘4th root of 81’.


2. (49)1/2


In general, a1/n is written as ‘nth root of a’.


So, (49)1/2 is written as ‘square root of 49’.


3. (15)1/5


In general, a1/n is written as ‘nth root of a’.


So, (15)1/5 is written as ‘5th root of 15’.


4. (512)1/9


In general, a1/n is written as ‘nth root of a’.


So, (512)1/9 is written as ‘9th root of 512’.


5. (100)1/19


In general, a1/n is written as ‘nth root of a’.


So, (100)1/19 is written as ‘19th root of 100’.


6. (6)1/7


In general, a1/n is written as ‘nth root of a’.


So, (6)1/7 is written as ‘7th root of 6’.


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