Posted by jump on Sunday, September 30, 2012 at 2:38pm.
determine any values of x for which a tangent line to the curve f(x)=1/x will have a slope of 4

cal  Reiny, Sunday, September 30, 2012 at 3:41pm
if y = 1/x
then dy/dx = 1/x^2
so 1/x^2 = 4
x^2 = 1/4
x = ± 1/√2