Just number 20

29/ view In problems 17 - 31 determine whether the given series converge or diverge. 17. n+1 1 1 + 5 18. n=1 (-1) "In(n ) 19. n 1=2 n +3 n=1 20. S (- 0.99 ) n+1 21. E(-Inn+3| n=5 "To + 7T 22. S (-1)+1 n=1 sin( n ) n=1 23. co cos( not ) 24. co sin( not ) Co 1=4 2 25. E (-1) 0+ 1 In( n) n=3 n n=1 26. (-1) n+1 In( n ) In( n ) 27. [ (-1) +1 In( n3 n=3 28. S (-1)"+ 1 5 n=2 In( n Vn + 7 n=1