Question

qual o oitavo termo da P.A (x+2, 2...)

Answer 1

usaremos a formula:

$a_n=a_1+(n-1)r$

r=-x
a1=x+2

$a_8=(x+2)+(8-1)(-x)$

$a_8=(x+2)+(-7x)$

$a_8=x+2-7x$

$a_8=2-6x$