29. let (a,) and {b, be sequences of real numbers defined as a =l and for n21, 2an+1 then dn+1 n +(-1)"2*", b, = nt1 n 92 +) a) la, converges to zero and {b,n i

29. Let (a,) and {b, be sequences of real numbers defined as a =l and for n21, 2an+1 Then dn+1 n +(-1)"2*", b, = nt1 n 92 +) A) la, converges to zero and {b,n is a Cauchy sequence B) {a,) converges to a non-zero number and {b,) is a Cauchy sequence t O4)converges to zero and {b,} is not a convergent sequence D) 2,) converges to a non-zero number and {b,} is'not a convergent sequence