# SOLUTION: Use log5(2)~.4307 and log5(3)~.6826 to approximate the expression without a calculator: log5(18)

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 Click here to see ALL problems on logarithm Question 72883: Use log5(2)~.4307 and log5(3)~.6826 to approximate the expression without a calculator: log5(18) Answer by jim_thompson5910(28598)   (Show Source): You can put this solution on YOUR website!Use these identities to solve If we let x=2 and y=3 for the 1st identity we get This gets us halfway to 18. Now plug in the approximate values Notice how this turns into log(18) using the identities. Plug in remaining values. Check: It's close enough to work So Approximately of course