Letf(x)=ln
Chapter 11, Problem 38(choose chapter or problem)
Letf(x)=ln|secx+tanx|.Itcanbeshownthatf?(0) = 1,f??(0) = 0,f???(0) = 1, andf(4)(0) = 0. What isthe fourth Taylor polynomial off(x)atx=0?
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