Which term of the sequence `20,19 1/4, 18 1/2, 17 3/4,...` is the first negative term?

Explanation

To find the first negative term of the sequence \(20, 19 \frac{1}{4}, 18 \frac{1}{2}, 17 \frac{3}{4}, \ldots\), we can follow these steps:

### Step 1: Identify the first term and common difference
The first term \(A\) of the sequence is:
\[ A = 20 \]
To find the common difference \(D\), we can subtract the first term from the second term:
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