Determine the number of terms in the A.P. 3,4,5, …, 399 . Also find its ` 25^(th)` term .

Explanation

To solve the problem, we need to determine the number of terms in the arithmetic progression (A.P.) given by 3, 4, 5, ..., 399, and also find the 25th term of this A.P.

### Step-by-Step Solution:

1. **Identify the First Term (a) and Common Difference (d)**:
- The first term \( a = 3 \).
- The second term is \( 4 \), so the common difference \( d = 4 - 3 = 1 \).

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