Question

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

Answer 1

$P.G~(1,2,4...)$

$a_{1}=1\\a_{2}=2\\\\q=a_{2}/a_{1}=2/1=2$

$a_{n}=a_{1}*q^{n-1}\\a_{7}=a_{1}*q^{7-1}\\a_{7}=a_{1}*q^{6}\\a_{7}=1*2^{6}\\a_{7}=1*64\\a_{7}=64$