cos nat 10. n! Approximate the sum of the series by using the first six terms. 11. 5 (-1) "2 00 n = 0 n! 12. (-1)n+13 n2 n= 1 Determine the number of terms required to approximate the sum of the convergent series with an error of less than 0.001. 00 13. 14. (-1)n+1 n! n=0 n3 n= 1 Determine whether the series converges conditionally or absolutely or diverges. 15. [ (- 1 )n 2n 16. n! n=1 n= 1