Question

Dada a PA 3,9,15,21 determine o termo geral e o termo A27

Answer 1

Resposta:

$a_{n}=6n-3\\\\a_{27}=159$

Explicação passo-a-passo:

$a_{n}=a_{1}+(n-1).r\\a_{n}=3+(n-1).6\\a_{n}=3+6n-6\\a_{n}=6n-3$

$a_{27}=3+(27-1).6/[tex]</p><p>[tex]a_{27}=3+26.6\\a_{27}=3+156\\a_{27}=159$