Question

nono termo da pg (5,10,20) ?

Answer 1

Razão = 10/5 = 2

$a_{n}=a_{1}*r^n^-^1\\\\a_{9}=5*2^9^-^1\\\\a_{9}=5*2^8\\\\a_{9}=5*256\\\\a_{9}=1.280$