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Question

If `sqrt(3^n)` = 729, then the value of  n is :


Options:
A .  6
B .  8
C .  10
D .  12
Answer: Option D

`sqrt(3^n)` =  729 = `3^6`  `hArr`   (`sqrt(3^n)^2`) =  `(3^6)^2`  `hArr`  `3^n` =  `3^12` `hArr`   n = 12.




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