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April 2, 2015

April 2, 2015

Posted by **BJ** on Monday, October 31, 2011 at 10:10pm.

e^(1-x) = 4^x

You must use logs, not just a calculator.

- math - natural logs -
**Reiny**, Monday, October 31, 2011 at 10:15pmtake ln of both sides

ln( e^(1-x) = ln (4^x)

(1-x)lne = x(ln4)

1-x = xln4

xln4 + x = 1

x(ln4 + 1) = 1

x = 1/(ln4 + 1)

= appr. .419

check

LS = e^.581 = 1.7877

RS = 4^.416 = 1.7877 (not bad)

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