SOLUTION: 81=3^X How do you find X?
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Question 415204: 81=3^X How do you find X?
Found 2 solutions by nerdybill, Alan3354:
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
take log base 3 of both sides:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
If you know that 81 = 3^4, then
x = 4
--------
If you don't know that:
log(81) = x*log(3)
x = log(81)/log(3)
x = 4
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