Question

Determine o 8° termo da P.G (1,2,4...)

Answer 1

1, 2, 4, 8, 16, 32, 64, 128, 256, 512...
8° = 256

Answer 2

a1 = 1, an = 8, q = 2

an = a1·q^n-1
a8 = 1· 2^8-1
a8 = 2^7
a8 = 128