SOLUTION: how do you solve this? LOG3(81) 3 being the base of 81?

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Question 400394: how do you solve this?
LOG3(81)
3 being the base of 81?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Since 3%5E4+=+81, we conclude that log%283%2C+81%29+=+4.