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Questions: Algebra BusinessCalculus
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Use Simpson's rule to find the arclength of the curve \(\displaystyle f(x)=\ln{\left(x \right)}\) on \(\displaystyle (4,7)\) with \(\displaystyle n=20\).
\(\displaystyle \Delta x = \frac{ 7 - 4 }{ 20 }\). \(\displaystyle x_i = a +i\Delta x = 4 + i \frac{3}{20}\)Using the 1,4,2,...,2,4,1 pattern the sum can be written as \(\displaystyle x_i\) can be written split into the even and odd terms. \(\displaystyle x_k = 4 + (2k-1)\cdot \frac{3}{20}\) for \(\displaystyle k=1\) to \(\displaystyle k =10\) and \(\displaystyle x_j = 4 + (2j)\cdot \frac{3}{20}\) for \(\displaystyle j=1\) to \(\displaystyle j =9\). \(\displaystyle f(4) +f(7)+4\sum_{k=1}^{10}f\left(\frac{3 k}{10} + \frac{77}{20}\right) + 2\sum_{j=1}^{9}f\left(\frac{3 j}{10} + 4\right)\). The value is \(\displaystyle 3.0531\)
\begin{question}Use Simpson's rule to find the arclength of the curve $f(x)=\ln{\left(x \right)}$ on $(4,7)$ with $n=20$.
\soln{9cm}{$\Delta x = \frac{ 7 - 4 }{ 20 }$. $x_i = a +i\Delta x = 4 + i \frac{3}{20}$Using the 1,4,2,...,2,4,1 pattern the sum can be written as $x_i$ can be written split into the even and odd terms. $x_k = 4 + (2k-1)\cdot \frac{3}{20}$ for $k=1$ to $k =10$ and $x_j = 4 + (2j)\cdot \frac{3}{20}$ for $j=1$ to $j =9$. $f(4) +f(7)+4\sum_{k=1}^{10}f\left(\frac{3 k}{10} + \frac{77}{20}\right) + 2\sum_{j=1}^{9}f\left(\frac{3 j}{10} + 4\right)$. The value is $3.0531$}
\end{question}
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\begin{document}\begin{question}(10pts) The question goes here!
\soln{9cm}{The solution goes here.}
\end{question}\end{document}<p> <p>Use Simpson's rule to find the arclength of the curve <img class="equation_image" title=" \displaystyle f(x)=\ln{\left(x \right)} " src="/equation_images/%20%5Cdisplaystyle%20f%28x%29%3D%5Cln%7B%5Cleft%28x%20%5Cright%29%7D%20" alt="LaTeX: \displaystyle f(x)=\ln{\left(x \right)} " data-equation-content=" \displaystyle f(x)=\ln{\left(x \right)} " /> on <img class="equation_image" title=" \displaystyle (4,7) " src="/equation_images/%20%5Cdisplaystyle%20%284%2C7%29%20" alt="LaTeX: \displaystyle (4,7) " data-equation-content=" \displaystyle (4,7) " /> with <img class="equation_image" title=" \displaystyle n=20 " src="/equation_images/%20%5Cdisplaystyle%20n%3D20%20" alt="LaTeX: \displaystyle n=20 " data-equation-content=" \displaystyle n=20 " /> . </p> </p><p> <p> <img class="equation_image" title=" \displaystyle \Delta x = \frac{ 7 - 4 }{ 20 } " src="/equation_images/%20%5Cdisplaystyle%20%5CDelta%20x%20%3D%20%5Cfrac%7B%207%20-%204%20%7D%7B%2020%20%7D%20" alt="LaTeX: \displaystyle \Delta x = \frac{ 7 - 4 }{ 20 } " data-equation-content=" \displaystyle \Delta x = \frac{ 7 - 4 }{ 20 } " /> . <img class="equation_image" title=" \displaystyle x_i = a +i\Delta x = 4 + i \frac{3}{20} " src="/equation_images/%20%5Cdisplaystyle%20x_i%20%3D%20a%20%2Bi%5CDelta%20x%20%3D%204%20%2B%20i%20%5Cfrac%7B3%7D%7B20%7D%20" alt="LaTeX: \displaystyle x_i = a +i\Delta x = 4 + i \frac{3}{20} " data-equation-content=" \displaystyle x_i = a +i\Delta x = 4 + i \frac{3}{20} " /> Using the 1,4,2,...,2,4,1 pattern the sum can be written as <img class="equation_image" title=" \displaystyle x_i " src="/equation_images/%20%5Cdisplaystyle%20x_i%20" alt="LaTeX: \displaystyle x_i " data-equation-content=" \displaystyle x_i " /> can be written split into the even and odd terms. <img class="equation_image" title=" \displaystyle x_k = 4 + (2k-1)\cdot \frac{3}{20} " src="/equation_images/%20%5Cdisplaystyle%20x_k%20%3D%204%20%2B%20%282k-1%29%5Ccdot%20%5Cfrac%7B3%7D%7B20%7D%20" alt="LaTeX: \displaystyle x_k = 4 + (2k-1)\cdot \frac{3}{20} " data-equation-content=" \displaystyle x_k = 4 + (2k-1)\cdot \frac{3}{20} " /> for <img class="equation_image" title=" \displaystyle k=1 " src="/equation_images/%20%5Cdisplaystyle%20k%3D1%20" alt="LaTeX: \displaystyle k=1 " data-equation-content=" \displaystyle k=1 " /> to <img class="equation_image" title=" \displaystyle k =10 " src="/equation_images/%20%5Cdisplaystyle%20k%20%3D10%20" alt="LaTeX: \displaystyle k =10 " data-equation-content=" \displaystyle k =10 " /> and <img class="equation_image" title=" \displaystyle x_j = 4 + (2j)\cdot \frac{3}{20} " src="/equation_images/%20%5Cdisplaystyle%20x_j%20%3D%204%20%2B%20%282j%29%5Ccdot%20%5Cfrac%7B3%7D%7B20%7D%20" alt="LaTeX: \displaystyle x_j = 4 + (2j)\cdot \frac{3}{20} " data-equation-content=" \displaystyle x_j = 4 + (2j)\cdot \frac{3}{20} " /> for <img class="equation_image" title=" \displaystyle j=1 " src="/equation_images/%20%5Cdisplaystyle%20j%3D1%20" alt="LaTeX: \displaystyle j=1 " data-equation-content=" \displaystyle j=1 " /> to <img class="equation_image" title=" \displaystyle j =9 " src="/equation_images/%20%5Cdisplaystyle%20j%20%3D9%20" alt="LaTeX: \displaystyle j =9 " data-equation-content=" \displaystyle j =9 " /> . <img class="equation_image" title=" \displaystyle f(4) +f(7)+4\sum_{k=1}^{10}f\left(\frac{3 k}{10} + \frac{77}{20}\right) + 2\sum_{j=1}^{9}f\left(\frac{3 j}{10} + 4\right) " src="/equation_images/%20%5Cdisplaystyle%20f%284%29%20%2Bf%287%29%2B4%5Csum_%7Bk%3D1%7D%5E%7B10%7Df%5Cleft%28%5Cfrac%7B3%20k%7D%7B10%7D%20%2B%20%5Cfrac%7B77%7D%7B20%7D%5Cright%29%20%2B%202%5Csum_%7Bj%3D1%7D%5E%7B9%7Df%5Cleft%28%5Cfrac%7B3%20j%7D%7B10%7D%20%2B%204%5Cright%29%20" alt="LaTeX: \displaystyle f(4) +f(7)+4\sum_{k=1}^{10}f\left(\frac{3 k}{10} + \frac{77}{20}\right) + 2\sum_{j=1}^{9}f\left(\frac{3 j}{10} + 4\right) " data-equation-content=" \displaystyle f(4) +f(7)+4\sum_{k=1}^{10}f\left(\frac{3 k}{10} + \frac{77}{20}\right) + 2\sum_{j=1}^{9}f\left(\frac{3 j}{10} + 4\right) " /> . The value is <img class="equation_image" title=" \displaystyle 3.0531 " src="/equation_images/%20%5Cdisplaystyle%203.0531%20" alt="LaTeX: \displaystyle 3.0531 " data-equation-content=" \displaystyle 3.0531 " /> </p> </p>