(1) Show that |ln 2 - Ʃ^{N}_{n=1} ((-1)^{n-1})(1/n)| ≤ 1/(N+1) (2) Show that |sin x - Ʃ^{N}_{n=0} ((-1)^{n})/(2n+1)!| ≤ |x|^{2N+2}/(2N+2)! I really don't know where to start. should I change the sums to series first then work my way through? Please help!