Question

qual é o 6° termo da P.G (-240,-120,-60,...)¿

Answer 1

$\boxed{a_n = a_1*q^n^-^1}$

$q = \frac{-120}{-240} = \frac{1}{2}\\\\\ a_1 = -240$

$a_6 = -240*\frac{1}{2}^5\\\\\ a_6 = -240*\frac{1}{32}\\\\ \boxed{a_6 = -7,5}$

Answer 2

Informações


$a_1=-240$

$q= \frac{a_2}{a_1} \\ \\ \\q= \frac{-120}{-240} ~\to~q= \frac{1}{2}$

$a_6=?$

Resposta


$an=a_1.q^{n-1}\\ \\a_6=-240. \frac{1}{2}^{6-1}\\ \\a_6=-240. \frac{1}{32} \\ \\a_6= -\frac{15}{2}$