1003097003

Level: 
Project ID: 
1003097003
Source Problem: 
Accepted: 
1
Clonable: 
1
Easy: 
0
Find the sum of the first five terms of an arithmetic sequence \( \left\{a_n\right\}_{n=1}^{\infty} \), if: \[ \begin{aligned} a_1\cdot a_4&=100 \\ a_2+a_6&=10 \end{aligned} \]
\( 50 \)
\( 0 \)
\( 20 \)
\( -5 \)
\( 90 \)