Question

Determine a25.
Then they give you this:
an = 20 + (n-1)4

Answer 1

The 25th term (a25) of the given arithmetic sequence is 116, computed by substituting n = 25 in the formula an = 20 + (n-1)4 and simplifying.

Step-by-step explanation:

To determine the 25th term (a25) of the arithmetic sequence given by the formula an = 20 + (n-1)4, we simply need to substitute n with 25.

Following the formula given, a25 = 20 + (25-1)×4

= 20 + (24)×4

= 20 + 96

= 116

Therefore, the 25th term of the sequence, a25, is 116.