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December 27, 2014

December 27, 2014

Posted by **Emily** on Tuesday, February 12, 2013 at 5:09pm.

- Calculus -
**Reiny**, Tuesday, February 12, 2013 at 5:32pmln [ (16-12x)/x^2 ] = ln 4

(16-12x)/x^2 = 4

4x^2 = 16-12x

x^2 + 3x - 4 = 0

(x+4)(x-1) = 0

x = -4 or x=1

but if x = -4 , 2lnx in the original equation is not defined, so

x = 1

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