Final answer:
To find the fourth term (a4) of the sequence an=n²-n, substitute 4 for n to get 4² - 4, which simplifies to 16 - 4 and gives a result of 12.
Step-by-step explanation:
The student asked for a4 for the sequence an=n²-n. To find the fourth term in the sequence (a4), we simply substitute n with 4 in the given formula.
- So, a4 = 4² - 4
- a4 = 16 - 4
- a4 = 12
Hence, the fourth term of the sequence is 12.