Question

Determine o 9° termo da P.G (¹/4,1,4,16,...)

Answer 1

q = 1 : 1/4 = 4

an = a1 . $q^{n - 1}$
a9 = 1/4 . $4^{9 - 1}$
a9 = 1/4 . $4^{8}$
a9 = 1/4 . 65.536
a9 = 65.536/4
a9 = 16.384


PG ( 1/4 , 1 , 4 , 16 , 64 , 256, 1.024, 4.096,16.384 )