Question

What is the 25th term in the following arithmetic sequence? -7, -2, 3, 8, ...

Answer 1

108.

Explanation:

-7, -2, 3, 8 is an arithmetic sequence with a1 (first term) = -7 and common difference (d) = 5.

The 24th term = a1 + (24 - 1)d

= -7 + 23 * 5

= -7 + 115

= 108.