Question

Answer if you known only The first five terms of an arithmetic sequence are given:

Answer 1

Hey mate!
You stuck?

The sequence is lowering in intervals of -3. Therefore, your next term in the sequence would be, -7

Hope this helps! :)

Answer 2

$\star$ In any arithmetic sequence, each term is equal to the previous term plus the common difference. 

$\star$ Thus, the second term is equal to the first term plus the common difference. In this sequence, the second term, 5, is 3 less than the first term, 8. 

$\star$ Therefore, the common difference is -3.