Question

calcular o 8° termo da pg (1,4,-16,...)

Answer 1

an = a8
q = a2/a1
q = 4/1
q = 4
an = a1 . q^n-1
a8 = 1 . 4^8-1
a8 = 1 . 4^7
a8 = 1 . 16,384
a8 = 16,384