65. it is given that the series a a, is convergent, n=l but not absolutely convergent and24,=0. n=l denote by s, the partial sum ,k=1,2. n=l then k a. s = 0 for

DECEMBER 2011 QUESTION given that the series a a, is Convergent, n=l but not absolutely convergent and24,=0. n=l Denote by s, the partial sum ,k=1,2. n=l Then k A. s = 0 for infinitely many k B. S 0 for infinitely many k, and s <0 for infinitely many k Le. it is possible that s > 0 for all k D. it is possible that s > 0 for all but a finite S k number of values of k