What is the equation of the tangent line to #f(x)=3-14x# at #x=8#?

1 Answer
Feb 17, 2015

Your #f(x)# is a linear function whose graph is a straight line, so I am not sure whether or not you can find a tangent line to a...line (a tangent line being a line with only one point in common with your curve)! You may argue that a line crossing your line at #x=8# (having a point in common) has the same property of the tangent but I think that it doesn't work (also because you'll get an #oo# number of them).