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Math Help - maximujm and minimum

  1. #1
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    maximujm and minimum

    the wrok done by a voltaic cell pf cpnstant electromotive force E and constant resistance r in passing a steadt current through an external, resistance R is proportional to E^2R/(r+R)^2. Show that the work done is greatest when R=r

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  2. #2
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    Re: maximujm and minimum

    Use the First Derivative Test for work as a function of R.
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