http://www.webassign.net/cgi-bin/sym...sqrt%28t%29%29 I changed it to 2(t)^(1/2) - 6/(t^(1/2)) f'(t) = t^(-1/2) - 6/((1/2)(t^(-1/2)) f'(t) = t^(-1/2) -12t^(-1/2) my final answer is wrong, please explain.
Last edited by mr fantastic; Jul 13th 2011 at 04:50 AM. Reason: Re-titled.
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