Only 20 and 23

In problems 17 - 31 determine whether the given series converge or diverge. 17. S ( - 1) ' n+1 1 n +5 18. [ (-1) " n n=1 In( n ) 19. S (-1)+1 n=2 n + 3 n=1 20. (-0.99 ) n+1 21. (InIn+3| n=5 In + 71 22. S (-1)+1 n=1 sin( n ) n=1 co cos( not ) 23. E co sin( not ) n 24. n=4 n 25. " (-1) n+1 In( n ) n=3 n n=1 26. (-1) n+1 In( n ) In( n ) 27. S (-1) n+1 In( ns n=3 In( n 28. n=2 Vn + 7 n=1 (-2)n+1 29. 21 + (-3 ) " 30. S (-1)n+1 (-2) n+1 n=1 n=3 1 + 30 31. > cos( not ) sin( t ) n= 1