Write first four terms of the A. P., when the first term a and the common difference d are given as follows :
`a =-2, d =0`

Answer

To find the first four terms of the arithmetic progression (A.P.) given the first term \( a = -2 \) and the common difference \( d = 0 \), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the first term \( a \)**:
\[ a_1 = a = -2 \]

2. **Calculate the second term \( a_2 \)**:
\[ a_2 = a + d = -2 + 0 = -2 \]

3. **Calculate the third term \( a_3 \)**:
\[ a_3 = a + 2d = -2 + 2 \times 0 = -2 \]

4. **Calculate the fourth term \( a_4 \)**:
\[ a_4 = a + 3d = -2 + 3 \times 0 = -2 \]

5. **List the first four terms**:
The first four terms of the A.P. are:
\[ a_1, a_2, a_3, a_4 = -2, -2, -2, -2 \]

### Final Answer:
The first four terms of the A.P. are:
\[ -2, -2, -2, -2 \]