(3)res[(=),-n]=limn[(z+m)(z) lim (二+m)I(z+n+1) (z+1)…(z+n) T(1 n(-n+1)…(-1)(-1)ynl =(-1) coS Z (res[ctg, k -=KT sIn| 1 sin' cos (4) [ , ] ! 1 ( 1) ( 1) ! (1) ( 1) ( 1) (1) ( 1) ( ) ( ) ( 1) lim (3) [ ( ), ] lim [( ) ( )] = = = - - G = - - + ××× - G = + ××× + + G + + = G - = + G = ®- ®- p z kp n n z n z n z z res ctgz k n n n n z z z n z n z n res z n z n z