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A soma dos doze primeiros termos de uma Pg de razão 3 é 265.720. Determine o primeiro termo.

User Tejendra
by
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1 Answer

1 vote

the question in English is

The sum of the first twelve terms of a Pg of ratio 3 is 265,720. Determine the first term


we know that

When we need to sum a Geometric Sequence the formula is equal to


Sum=a1*[(1-r^(n))/(1-r) ] \\ 265,720=a1*[(1-3^(12))/(1-3) ]\\ 265.720=a1*[265,720]\\ a1=1


therefore


the answer is

the first term is equal to 1



the answer in Portuguese


nós sabemos isso

Quando precisamos somar uma Seqüência Geométrica, a fórmula é igual a


Soma=a1*[(1-r^(n))/(1-r) ] \\ 265,720=a1*[(1-3^(12))/(1-3) ]\\ 265.720=a1*[265,720]\\ a1=1


assim sendo

a resposta é

o primeiro termo é igual a 1

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