--- ### Problem Statement **4.** Given to the right is the graph of a function \( f' \), the DERIVATIVE of some function \( f \). Among the four graphs below are the functions \( f \) and \( f'' \). ![Graphs](url) - **Graph (i):** A graph showing a curve with a positive slope starting from the top left, decreasing through the x-axis, and continuing with a negative slope. - **Graph (ii):** A graph with a wave-like curve, crossing the x-axis three times. - **Graph (iii):** A graph with an S-shaped curve moving from the bottom left to top right. - **Graph (iv):** A graph of a curve that first decreases to a minimum point and then increases. **Task:** (a) State which of the four graphs above is the graph of \( f \). Clearly state your answer, and **explain** using complete sentences how you know your answer is right. (b) State which of the four graphs above is the graph of \( f'' \). Clearly state your answer, and **explain** using complete sentences how you know your answer is right. --- ### Explanation - The graph labeled nearby is a simple curve with a peak and a trough, which is indicative of a derivative graph. The task is to match this with the primary function \( f \) and the second derivative function \( f'' \) from the provided graphs. - **Graph Analysis** - **Graph (i):** Indicates change from an increasing function to a decreasing function. - **Graph (ii):** Illustrates possible inflection points due to multiple crossings. - **Graph (iii):** S-shaped graph suggesting continuous increase or decrease in the rate of change. - **Graph (iv):** A parabolic shape that could indicate a primary or secondary derivative nature due to symmetrical curvature. The objective is to correctly pair these descriptions with \( f \) and \( f'' \) considering the provided derivative. ---

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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### Problem Statement

**4.** Given to the right is the graph of a function \( f' \), the DERIVATIVE of some function \( f \). Among the four graphs below are the functions \( f \) and \( f'' \).

![Graphs](url)  
- **Graph (i):** A graph showing a curve with a positive slope starting from the top left, decreasing through the x-axis, and continuing with a negative slope.
- **Graph (ii):** A graph with a wave-like curve, crossing the x-axis three times.
- **Graph (iii):** A graph with an S-shaped curve moving from the bottom left to top right.
- **Graph (iv):** A graph of a curve that first decreases to a minimum point and then increases.

**Task:**

(a) State which of the four graphs above is the graph of \( f \). Clearly state your answer, and **explain** using complete sentences how you know your answer is right.

(b) State which of the four graphs above is the graph of \( f'' \). Clearly state your answer, and **explain** using complete sentences how you know your answer is right.

---

### Explanation

- The graph labeled nearby is a simple curve with a peak and a trough, which is indicative of a derivative graph. The task is to match this with the primary function \( f \) and the second derivative function \( f'' \) from the provided graphs.
  
- **Graph Analysis**
  - **Graph (i):** Indicates change from an increasing function to a decreasing function.
  - **Graph (ii):** Illustrates possible inflection points due to multiple crossings.
  - **Graph (iii):** S-shaped graph suggesting continuous increase or decrease in the rate of change.
  - **Graph (iv):** A parabolic shape that could indicate a primary or secondary derivative nature due to symmetrical curvature.

The objective is to correctly pair these descriptions with \( f \) and \( f'' \) considering the provided derivative.

---
Transcribed Image Text:--- ### Problem Statement **4.** Given to the right is the graph of a function \( f' \), the DERIVATIVE of some function \( f \). Among the four graphs below are the functions \( f \) and \( f'' \). ![Graphs](url) - **Graph (i):** A graph showing a curve with a positive slope starting from the top left, decreasing through the x-axis, and continuing with a negative slope. - **Graph (ii):** A graph with a wave-like curve, crossing the x-axis three times. - **Graph (iii):** A graph with an S-shaped curve moving from the bottom left to top right. - **Graph (iv):** A graph of a curve that first decreases to a minimum point and then increases. **Task:** (a) State which of the four graphs above is the graph of \( f \). Clearly state your answer, and **explain** using complete sentences how you know your answer is right. (b) State which of the four graphs above is the graph of \( f'' \). Clearly state your answer, and **explain** using complete sentences how you know your answer is right. --- ### Explanation - The graph labeled nearby is a simple curve with a peak and a trough, which is indicative of a derivative graph. The task is to match this with the primary function \( f \) and the second derivative function \( f'' \) from the provided graphs. - **Graph Analysis** - **Graph (i):** Indicates change from an increasing function to a decreasing function. - **Graph (ii):** Illustrates possible inflection points due to multiple crossings. - **Graph (iii):** S-shaped graph suggesting continuous increase or decrease in the rate of change. - **Graph (iv):** A parabolic shape that could indicate a primary or secondary derivative nature due to symmetrical curvature. The objective is to correctly pair these descriptions with \( f \) and \( f'' \) considering the provided derivative. ---
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