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  2e3t = 400   |:2

  e3t   = 200 

 lne2t =ln200      

 2tlne=ln200     lne=1

     2t =ln200  |:2

        t=ln200/2

        t=2,649158683...

laugh

Omi67  Apr 7, 2017
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Omi: A mistake in the second step: ln e^2t = ln 200 <--- 2t should be changed to 3t. A typo.

MaxWong  Apr 7, 2017

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