(a) Find the equation of the best quadratic approximation to y = ln x at x = 1. The best quadratic approximation has the same first and second derivatives as y = ln x at x = 1.
(b) Use a computer or calculator to graph the approximation and y = ln x on the same set of axes. What do you notice?
(c) Use your quadratic approximation to calculate approximate values for ln(1.1) and ln(2).