m1+a”(a>D (6) n/n n(n+D) (10) lI In n!2 (13) (14) n (15) (x≥0) 33.53.5·73.5·7.9 (17) 1.41.4.71·4·7.10 (19) (n n)(5) 1 1 1 n n a  = +  ( 1); a  (6) 1 1 ; n n n n  =  (7) 1 1 ( ) ; 2 1 n n n  = +  (8) 1 1 ; [ln( 1)]n n n  = +  (9) 1 2 ( 1) ; 2 n n n  = + −  (10) 1 2 sin ; 3 n n n   =  (11) 1 ; ! n n n n  =  (12) 1 ln ; 2 n n n n  =  (13) 1 !2 ; n n n n n  =  (14) 1 !3 ; n n n n n  =  (15) 2 1 ; 1 ( ) n n n n n  = +  (16) 2 1 (1 )(1 ) (1 ) n n n x x x x  = + + +  ( 0); x  (17) 3 3 5 3 5 7 3 5 7 9 ; 1 1 4 1 4 7 1 4 7 10       + + + +       (18) ln 1 1 ; n n n  =  (19) ln 1 1 ; (ln ) n n n  = 