11.7 Converge or diverge? Which test? 1 1 1) 2) n2 3) 4) (n + 1)n n n + n cos2 (n) n2 n=1 n=1 n=1 n=1 n +1\\ n n2 n 20 n2 3 . 7 . 11 . ... (4n - 1) 5 ) > 6) 7) 8) n2n n+1 n! n=1 4 . 9 . 14 . . . . . (5n - 1) n= n=1 n=1 OO 9 ) E (2n)! 10) n sin (3n)! 11) n sin 12 ) 13) [ (et/2 - 11) n=1 n=1 n=1 n=1 n=1 n +1 n Hint: lim = e n-too n