Step 1: Recall the formula for the nth term of an A.P.
For an arithmetic progression, the nth term is given by:
\[
t_n = a + (n - 1)d
\]
Step 2: Substitute the given values.
Given that \(a = 3.5\) and \(d = 0\), we have:
\[
t_n = 3.5 + (n - 1)(0)
\]
Step 3: Simplify the expression.
\[
t_n = 3.5 + 0 = 3.5
\]
Step 4: Conclusion.
Therefore, for any value of \(n\), the nth term of the given A.P. is constant, \(t_n = 3.5.\) Final Answer:
\[
\boxed{t_n = 3.5}
\]