Question

Dada a PG (2,10,50,...) determine o 9° termo;​

Answer 1

Resposta:

a1=2

q=10/2=5

n=8

APLICANDO A FORMULA:

a⁸=2*5(⁸‐¹)

a⁸=2*5⁷

=2*78.125

=156.250

espero ter ajudado!!❤❤

Answer 2

$a_1.q=a_2$

$q=\frac{a_2}{a_1}$

$q=\frac{10}{2}$

$q=5$

$a_9=a_1.q^{9-1}$

$a_9=2.5^8\\a_9=2.390625\\a_9=781250$