24 F. Rogel 



3. 



lf(x) = l nV * =VÍ-&.a« -1<*<1. 



Hier ist A n =z — S in , daher 

 n 



sera nVx sL-iÁ^r ' n F- v y 



Víc 



•-"= T/- 



smi jryc 



M = l 



-4-1(-d m ^ 



■ Y* 



n—l 



folglich 



^7- = 77(1 - á») ' ° Ž . . . . (61) 



in nYx J~JL 



* 2 <1 



woraus ftir x = — 

 4 



^^-i) 





4. 



Z sec — it Yx +y^— T 2n x n , x 2 < 1 



1 



3 = 1,3,5... ' ' 



Icos^TtYx^J^^-iy-T^ . 1(1 - *) 



,.. 1 



woraus fur x =z — 

 4 



(Q2) 



cos-^-ir,Yx—JT{l — x n ) n o — . . . .(63) 



ra = l 



Z 2 <1 



