Level:
Project ID:
1003134708
Accepted:
1
Clonable:
0
Easy:
0
Find the sum of the second and the third term of the geometric sequence \( \{a_n\}_{n=1}^{\infty} \), if: \[ \begin{aligned} \frac{a_4}{a_1}&=-8, \\ a_4-a_2&=-9. \end{aligned} \]
\( 3 \)
\( -3 \)
\( \frac32 \)
\( -2 \)
\( \frac92 \)