Question

In an arithmetic series, the sum of the sixth and seventh terms is equal to five times the sum of the first and second terms. The fourth term of the series is 15. Find

(a) the first term and common difference. (b) the sum from the tenth to the twenty fifth term of the series.​

Answer 1

Answer:

(A)The first term and common difference.

Step-by-step explanation:

I Hope its help