Determine if the following series converge or diverge. If itconverges, find the sum.
a. ?n=(3^n+1)/(2n) (upper limit of sigma?, lower limit isn=0)
b.?n=(cosn?)/(2) (upper limit of sigma? , lower limit is n=1
c.?n=(40n)/(2n?1)^2(2n+1)^2 (upper limit of sigma ? lower limitis n= 1
d.)?n = 2/(10)^n (upper limit of sigma ? , lower limit of sigman= 10)
