Question

encontre a razao da pg (an) nen talque a1=2 a5=162

Answer 1

$q=?\\ a_1=2\\ a_n=a_5=162\\n=5\\\\\\ a_n=a_1 *q^{n-1}\\\\\\ 162=2*q^{5-1}\to \\\\ 162=2*q^{4}\to \\ \\ \frac{162}{2} =q^{4}\to \\\\ 81=q^{4}\to \\\\ 3^4=q^{4}\to \\\\ q=3$