A small Picture information error

**Describe the bug:**
The picture shows a value different from the description text.
**To reproduce**

1. Go to chapter 10 L'Hôpital's rule
2. Search for the gray font description:"Plug a number really close to 1 in for 𝑥 or zoom in on the graph of this function and we can see this limit is approximately equal to −1.57."
3. Look at the the picture above the text description, it shows that the limit is approximately equal to a wrong value :1.57.