Question

calcule o oitavo termo da PA (-6, -2, 2,....)

Answer 1

$a_1 = -6 \\ r = 4 \\ a_8 = \,? \\ \\ a_n = a_1+(n-1)r \\ \\ a_8 = -6+(8-1).4 \\ \\ a_8 = -6 + 7.4 \\ \\ a_8 = -6 + 28 \\ \\ a_8 = 22$

O oitavo termo é $a_8 = 22$