Hopefull I am at least on the right track, here's what I tried to do: Let And I don't know what to do next.
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Originally Posted by xxlvh Hopefull I am at least on the right track, here's what I tried to do: Let And I don't know what to do next. note that . The derivative is (if you simplified your denominator, you would have gotten the same thing). Now just plug in and continue (You should have the on the right side of the equation also)
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