1. Find 2nd degree maclaurin polynomial that approximates f(x)=sec(x)
2. Find 3rd degree Taylor polynomial that approximates f(x)=(2/x) at c=1
3. Find radius of convergence of power series n=0 to infinity: ((2n)!*x^(2n))/(n!)
4. Find interval of convergence of power series n=1 to infinity...