Question

Calcular o 1° termo de uma P.G cujo o 6° termo vale 1 e a razão 2

Answer 1

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Solução!

$a6=1\\\\\ q=2\\\\\ a1=?\\\\\\\\ Fazendo!\\\\\\\ a6=a1.q^{(n-1)}\\\\\\\ 1=a1.2^{(6-1)}\\\\\\ 1=a1.2^{5} \\\\\\ 1=a1.32\\\\\\ a1= \dfrac{1}{32}$

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Bons estudos!