Question

Seja a sequência ( 3, 6, 12, .......) uma PG, qual é o 10º termo da sequência​

Answer 1

$\boxed{\begin{array}{l}\rm Seja~a~sequ\hat encia~(3,6,12...)~uma~PG\\\sf qual~\acute e~o~d\acute ecimo~termo~da~sequ\hat encia?\\\rm a)30\\\rm b)1536\\\rm c)3072\\\rm d)2048\\\rm e)3000\end{array}}$

$\large\boxed{\begin{array}{l}\tt dados\begin{cases} \sf a_3=12\\\sf q=\dfrac{6}{3}=2\\\sf a_{10}=?\end{cases}\\\underline{\rm soluc_{\!\!,}\tilde ao:}\\\sf a_{10}=a_3\cdot q^7\\\sf a_{10}=12\cdot2^7\\\sf a_{10}=12\cdot128\\\sf a_{10}=1536\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~b}}}}\end{array}}$

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