1003085101
Level:
A
The second term of an arithmetic sequence is \( 3 \) and the fourth term is \( -1 \). Find the recursive formula for the sequence.
\( a_1=5;\ a_{n+1}=a_n-2 \text{ for all } n\in\mathbb{N} \)
\( a_1=2;\ a_{n+1}=a_n-2 \text{ for all } n\in\mathbb{N} \)
\( a_1=3;\ a_{n+1}=a_n-1 \text{ for all } n\in\mathbb{N} \)
\( a_1=5;\ a_{n+1}=a_n-4 \text{ for all } n\in\mathbb{N} \)
\( a_1=3;\ a_{n+1}=a_n-4 \text{ for all } n\in\mathbb{N} \)