A manufacturer of TV sets produced 600 sets in the third year and 700 sets in the seventh year. Assuming that the production increases uniformly by a fixed number every year, find :(i)         the production in the 1st year(ii)        the production in the 10th year(iii)       the total production in first 7 years

Explanation

To solve the problem step by step, we will use the properties of Arithmetic Progressions (AP).

### Step 1: Define the variables
Let the production in the 1st year be \( A \) and the fixed increase in production each year be \( D \).

### Step 2: Write the equations based on the given information
From the problem, we know:
- Production in the 3rd year:
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