Question

please solve donot only answer
solution required

Answer 1

2is right answer........

Answer 2

Let the first term be a and the common ratio be r.
Then, according to question,
$ar = 2$
and
$\frac{a}{1 - r} = 8 \\ a = 8 - 8r$
Substitute this in the first equation,
$(8 - 8r)r = 2 \\ 8r - 8 {r}^{2} = 2 \\ 4 {r}^{2} - 4r + 1 = 0$
Solving the quadratic, we get the value of r equal to 0.5, which gives the value of a equal to 4.