(-1)" let an 1+n let an and let cn = an-kak where n en u{0}.then which one of the following is true? (a) both an and cn are convergent (6). an is convergent but

(-1)" Let an 1+n Let an and let Cn = an-kak where n EN U{0}.Then which one of the following is TRUE? (a) Both an and Cn are convergent (6). an is convergent but Cn is not vonverg n=1 Cn is convergent but an is not convergent n=0 (d) Neither Cn is convergent an * nor n=0