1.

If `log_(2)(log_(2)(log_(2)x))=2`, then the number of digits in x, is `(log_(10)2=0.3010)`A. 7B. 6C. 5D. 4

Answer» Correct Answer - C
`log_(2)(log_(2)(log_(2)x))=2`
`rArr log_(2)(log_(2)x)=4`
`rArr log_(2)x=16`
`rArr x=2^(16)`
`therefore log_(10)x=16log_(10)2=16xx0.3010=4.8160`
`therefore` Number of digits = 5


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