Find f'(x) when x has the given value. f(x) = -7/x; x = 6 I am getting 6/7
T thetomps Junior Member Joined Sep 26, 2005 Messages 59 Jan 30, 2006 #1 Find f'(x) when x has the given value. f(x) = -7/x; x = 6 I am getting 6/7
M mathstresser Junior Member Joined Jan 28, 2006 Messages 134 Jan 30, 2006 #2 f(x)=-7/x=-7x^-1 f'(x)=7x^-2=7/x^2 Then you substitute 6 so it should be 7/36.
