Question

determine o nono termo da pg (1/16,1/8,1,4)

Answer 1

a_n = a_1*q^(n-1)
1) 
q = (1/8)/(1/16) = 2
a_9 = (1/16)*2^(9-1) = (1/16)*2^(9-1)
a_9 = (1/16)*2^8
a_9 = 2^8/16 = 2^8/2^4
a_9 = 2^(8-4) = 2^4 = 16