Find the sum of two middle terms of the AP `-4/3,-1,-2/3,-1/3,...,4(1/3)`

Explanation

To find the sum of the two middle terms of the given arithmetic progression (AP) \(-\frac{4}{3}, -1, -\frac{2}{3}, -\frac{1}{3}, \ldots, 4\frac{1}{3}\), we will follow these steps:

### Step 1: Identify the first term (A) and the common difference (D)
The first term \(A\) is \(-\frac{4}{3}\).

To find the common difference \(D\), we calculate:
\[
D = \text{Second term} - \text{First term} = -1 - \left(-\frac{4}{3}\right) = -1 + \frac{4}{3} = \frac{-3 + 4}{3} = \frac{1}{3}
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