To solve the problem, we start with the given recurrence relation and the initial condition:
- \( d(1) = 3 \)
- \( d(m) = d(n - 1) - 14 \)
However, we need to clarify what the variables \( m \) and \( n \) stand for. It is reasonable to assume that we can express \( m \) in terms of \( n \), and suggest that \( m = n \).
Let's assume a pattern where \( m = n \). Hence, we can rewrite the recurrence as:
\[ d(n) = d(n - 1) - 14 \]
Now we can compute the subsequent terms of the sequence:
-
For \( n = 1 \): \[ d(1) = 3 \]
-
For \( n = 2 \): \[ d(2) = d(1) - 14 = 3 - 14 = -11 \]
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For \( n = 3 \): \[ d(3) = d(2) - 14 = -11 - 14 = -25 \]
-
For \( n = 4 \): \[ d(4) = d(3) - 14 = -25 - 14 = -39 \]
Thus, the first four terms of the sequence are:
- \( d(1) = 3 \)
- \( d(2) = -11 \)
- \( d(3) = -25 \)
- \( d(4) = -39 \)
The third term, \( d(3) \), is:
\[ \boxed{-25} \]