Question

calcule o 5 termo da PG (1, 5,...);
e calcule o 10 termo da PG (9,27, ...).

Answer 1

Resposta:

625 e 177147

Explicação passo-a-passo:

$\text{PG}(1,5,...)$

$a_5=a_1\cdot q^4$

$q=\dfrac{5}{1}=5$

$a_5=1\cdot5^4$

$\boxed{a_5=645}$

$\text{PG}(9,27,...)$

$a_{10}=a_1\cdot q^9$

$q=\dfrac{27}{9}=3$

$a_{10}=9\cdot3^9$

$\boxed{a_{10}=177147}$