Final answer:
The formula for the nth term of the given sequence is Tn = (Tn-1)/2.
Step-by-step explanation:
The given sequence can be written as:
4, 2, 1
To find the formula for the nth term of this sequence, we observe that each term is half of the previous term.
Let's denote the nth term as 'Tn'. To get from the (n-1)th term to the nth term, we divide the (n-1)th term by 2.
Therefore, the formula for the nth term of this sequence is:
Tn = (Tn-1)/2