Cho hình hộp chữ nhật ABCD.EGHK (tham khảo hình bên)

To address your request, I'll guide you through the problems related to the rectangular prism \( ABCD.EGHK \) as indicated in your question. Let's analyze the questions in the context given.

### a) Describe the rectangular prism \( ABCD.EGHK \)
This prism consists of:
- Base: Quadrilateral \( ABCD \)
- Points \( E, G, H, K \) are directly above their corresponding points \( A, B, C, D \).

### b) Determine the edges
From your description, the edges of the prism can be categorized as:
- Vertical edges: \( AE, BG, CH, DK \)
- Base edges: \( AB, BC, CD, DA \)
- Top edges: \( EH, FG, HK, GE \)

### c) Listing pairs of edges
**Question from section 2:**
- AB | GH
- CD | HK
- AD | (AG) or (EH)

### Problem-solving
1. **Identify Limits:**
- **Limit computation:** The equations given under "lim" should be approached using standard calculus techniques (L'Hôpital's rule, factoring, etc.).

2. **Continuity assessments:**
- Functions need to be analyzed for limits and continuity at specified points.

3. **Illustrate shapes using a 3D context:**
- The final request is for a visual representation where you could draw the letters CEE and LNT in a 3D box format, mimicking the structure of a cube.

### Sample Answer Steps
1. **Compute limits.**
2. **Analyze whether functions are continuous.**
3. **Draw a 3D representation based on given shapes.**

Could you specify any particular limit or function to solve if you have? This way, I can provide you with a more detailed answer and rationale.