-1,3,7,11
What is the 25th term?
To find the 25th term in the sequence -1, 3, 7, 11, we need to determine the pattern.
If we observe the sequence, we can see that each term is increasing by 4.
The first term is -1, the second term is 3 (which is +4 from -1), the third term is 7 (which is +4 from 3), and the fourth term is 11 (which is +4 from 7).
We can express this pattern using the formula for arithmetic sequence:
Term = First Term + (n - 1) * Common Difference
In this case, the first term (a) is -1, the common difference (d) is 4, and we want to find the 25th term (n).
Substituting these values into the formula, we have:
Term = -1 + (25 - 1) * 4
= -1 + 24 * 4
= -1 + 96
= 95
Therefore, the 25th term in the sequence is 95.