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

Explanation

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

### Step 1: Identify the first term and common difference
The first term \(a\) of the sequence is \(20\).

To find the common difference \(d\), we can subtract the second term from the first term:
\[
d = 19 \frac{1}{4} - 20 = 19.25 - 20 = -0.75 = -\frac{3}{4}
...