Numerical Differentiation: Forward & Backward Difference

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Questions and Answers

How did the discovery of human remains in Herculaneum shift archeologists' initial understanding of the events that transpired during the eruption of Mount Vesuvius?

  • It suggested that only the elderly and children were unable to escape the volcanic ash.
  • It confirmed the initial theory that the inhabitants successfully evacuated the city before the volcanic ash engulfed it.
  • It disproved the initial theory that the inhabitants successfully evacuated the city before the volcanic ash engulfed it. (correct)
  • It provided evidence that the inhabitants were aware of the impending eruption and chose to remain in their homes.

What can be inferred about the social and economic characteristics of Herculaneum based on archeological discoveries?

  • Herculaneum was a modest fishing village with limited infrastructure, as suggested by the small number of artifacts found.
  • Herculaneum was a prosperous resort town favored by Rome's elite, evidenced by well-preserved baths, luxurious homes, and artifacts like the 'Ring Lady'. (correct)
  • Herculaneum was a remote agricultural community with a focus on self-sufficiency, supported by the discovery of farming tools and storage facilities.
  • Herculaneum was a military outpost with barracks and armories, as evidenced by the discovery of weaponry.
  • Herculaneum was a bustling port city with a diverse population, as indicated by the discovery of foreign coins and goods.

How does the discovery of the 'Ring Lady' contribute to our understanding of daily life in Herculaneum?

  • It indicates the widespread literacy and love of literature among the inhabitants of Herculaneum, as rings were often inscribed with literary quotes.
  • It provides insight into the fashion, adornment, and personal wealth of individuals in Herculaneum. (correct)
  • It suggests a culture of athleticism and physical competition, as evidenced by the rings' design.
  • It highlights the rigid social hierarchy and limited opportunities for social mobility in Herculaneum.

What implications can be drawn from the discovery of skeletons in boat houses and on the beach in Herculaneum?

<p>The residents were attempting to flee by sea but were overcome by the eruption before they could escape. (A)</p> Signup and view all the answers

How did local authorities address the issue of the beach's black sand to enhance accessibility for visitors?

<p>They replaced the black sand with a dark-colored material that closely matched the original hue. (A)</p> Signup and view all the answers

How does the recent reopening of the excavated beach at Herculaneum influence the visitor experience, according to Francesco Sirano?

<p>It allows visitors to experience the site from the same vantage point as the ancient Romans, enhancing their connection to the past. (A)</p> Signup and view all the answers

What evidence suggests that Herculaneum was a popular destination for Rome's upper-class families?

<p>The city's mild weather and luxurious amenities made it an attractive holiday destination. (C)</p> Signup and view all the answers

How did the eruption of Mount Vesuvius in AD 79 contribute to the preservation of Herculaneum's structures and artifacts?

<p>The volcanic ash acted as a protective layer, shielding the city from the elements and preventing decay. (B)</p> Signup and view all the answers

What is the significance of the discovery of a soldier's remains near a boat in Herculaneum?

<p>It supports the theory that the soldier was participating in a rescue mission when he perished. (C)</p> Signup and view all the answers

In what way does the discovery of a shrine adorned with paintings depicting an ancient war contribute to our knowledge of Herculaneum?

<p>It provides insights into the artistic preferences, religious practices, and historical awareness of the city's inhabitants. (A)</p> Signup and view all the answers

Flashcards

What is Herculaneum?

A seaside resort near Pompeii that was buried by the eruption of Mount Vesuvius in AD 79.

What is AD 79?

The year Mount Vesuvius erupted, burying Pompeii and Herculaneum.

How is the Herculaneum beach accessed?

Visitors go down a tunnel, like going back 2,000 years, to reach the beach.

What did the 18th/19th century excavations reveal?

Buildings, art, scrolls, and artifacts discovered during the 18th and 19th centuries.

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What was found in the boat houses?

The skeletal remains of women, children, babies, and men found in boat houses and on the beach.

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Who was the 'Ring Lady'?

A skeleton adorned with emerald and ruby rings shows the lives and deaths of the people.

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Why was Herculaneum a holiday destination?

Once a popular holiday destination, the city was buried under 150 feet of ash.

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Why was the beach at Herculaneum restored?

The restored beach allows people to see it from the same position as the ancient Roman people.

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What structures make Herculaneum impressive?

Structures in Herculaneum included well-preserved baths and an underground theater.

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Study Notes

  • Theorem 2.1 states that if $f \in C^{n+1}[a, b]$ and $x, x_0 \in [a, b]$, then $$ f(x) = f(x_0) + f'(x_0)(x-x_0) + \frac{f''(x_0)}{2!}(x-x_0)^2 + \dots + \frac{f^{(n)}(x_0)}{n!}(x-x_0)^n + R_n(x), $$ where $$ R_n(x) = \frac{f^{(n+1)}(\eta)}{(n+1)!}(x-x_0)^{n+1}, $$ for some $\eta$ between $x_0$ and $x$.

Forward Difference

  • Taylor expansion of $f(x+h)$ about $x$: $$ f(x+h) = f(x) + hf'(x) + \frac{h^2}{2!}f''(x) + \frac{h^3}{3!}f'''(x) + \dots $$
  • Solving for $f'(x)$ yields: $$ f'(x) = \frac{f(x+h) - f(x)}{h} - \frac{h}{2!}f''(x) - \frac{h^2}{3!}f'''(x) - \dots $$
  • Approximation with error term: $$ f'(x) = \frac{f(x+h) - f(x)}{h} + O(h). $$
  • Forward difference formula: $$ f'(x) \approx \frac{f(x+h) - f(x)}{h}. $$

Backward Difference

  • Taylor expansion of $f(x-h)$ about $x$: $$ f(x-h) = f(x) - hf'(x) + \frac{h^2}{2!}f''(x) - \frac{h^3}{3!}f'''(x) + \dots $$
  • Solving for $f'(x)$ yields: $$ f'(x) = \frac{f(x) - f(x-h)}{h} + \frac{h}{2!}f''(x) - \frac{h^2}{3!}f'''(x) + \dots $$
  • Approximation with error term: $$ f'(x) = \frac{f(x) - f(x-h)}{h} + O(h). $$
  • Backward difference formula: $$ f'(x) \approx \frac{f(x) - f(x-h)}{h}. $$

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