This sequence follows a term-to-term rule of subtracting 3 from each term.

Given:

• The first term ($T_1$) is 12.
• The term-to-term rule is to subtract 3 from the previous term.

Now, calculate the next four terms:

$T_2 = 12 - 3 = 9$ $T_3 = 9 - 3 = 6$ $T_4 = 6 - 3 = 3$ $T_5 = 3 - 3 = 0$

Thus, the 5th term of the sequence is 0.

Would you like further details or clarification?

Here are 5 related questions to explore:

1. What is the 10th term of this sequence?
2. How many terms would it take for the sequence to reach a negative value?
3. If the term-to-term rule was $+3$ instead of $-3$, what would the 5th term be?
4. How can this sequence be expressed as an arithmetic sequence formula?
5. What is the sum of the first 5 terms in this sequence?

Tip: The difference between consecutive terms in a sequence is called the "common difference" in an arithmetic sequence.