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1) Given a function f(x) = (quadratic on top)/(quadratic on bottom)

When at x=1, I am given a tangent line to the function f(x), and also given the equation of the tangent line. How can I use the tangent line to estimate f(any number). Also how to find error of approximation within each of these 3 points???

2) Solve for x: ln(7−2x)−4lnx=ln8 ( I changed values so I have to do work by myself after I understand this)