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Take the natural log of both sides to implicitly derive the equation

Here's the new description with all links and additional text removed: Learn how to find the derivative of an implicit ...
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Using Mathcad to derive circuit equations and optimize circuit behavior

Mathcad (produced by Mathsoft, not to be confused with Matlab or Mathematica) is a general purpose mathematical analysis tool with WYSIWYG formula entry that can operate in both numeric and symbolic ...