Question

ME AJUDEM NESSA CONTA DE PG
COM O TERMO 9°

(2,-4,8,-16,32,...)

Answer 1

$\mathsf{q=-4\div2=-2}$

$\mathsf{a_{9}=a_{5}.q^4}\\\mathsf{a_{9}=32}\\\mathsf{a_{9}=32.(-2)^4=32.16=512}$