Question

An ариф прог а1=-3,а2=1​

Answer 1

d=1-(-3)=4

a8=-3+4*7=25

a8=25

Answer 2

It seems like the input you provided might be incomplete or contains some characters that are not recognizable. It appears to refer to an arithmetic progression (ариф прог) with the first two terms (а1 and а2) specified as -3 and 1, respectively. However, there is no information about the common difference (d) between consecutive terms, or the specific task related to this arithmetic progression.

If you could provide more details or clarify the question, I would be happy to help you with any calculations or information related to arithmetic progressions. For instance, if you are interested in finding the nth term, the sum of the first n terms, or any other related questions, please let me know, and I'll assist you accordingly.