Calcular o numero de termos da P.G (-1, -2, -4...,-512) ?.... Pergunta de ideia deMilena20141

Milena20141 @Milena20141

October 2020 1 48 Report

Calcular o numero de termos da P.G (-1, -2, -4...,-512) ?

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LuanaSC8

Verified answer

Formula
$a_{n} = a_{1} * q^{n-1}$

$-512=-1* 2^{n-1}$
$-512= -2^{n-1}$
$-2^{9} = -2^{n-1}$ Corte -2 com -2
$9=n-1$
$9+1=n$
n=10

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