computer science

Use the attached html file and images folder for the exam. You can see the output of the

Initially you need to hide the first table all div's, like shown in the output below Web Frogramming Lab Exam $3$

artar.

Click the "Show$/$Hide Country Flag" button to slide down the "cntryDiv" and make other div's slide up

Do the same with other two "Show$/$Hide$"$ buttons

Check the output when the user clicks "Show$/$Hide Country Flag"

Web Programmint Lab Fxam $3$

The user will enter the country name in the country text field and clicks on show button it will display the entered country name flag in the image below. I have given $5$ country flags in the images folder $[$Saudi$,$ US$,$ Brazil, Bahrain. England$].$ Also when the user clicks on "Dark$/$Light$"$ button it will toggle the background color of that to black $($use toggleClass method for this task$).$

Web Programuing Lab Exami $3$

lendum

simplest central finite difference approximation for $2^{nd}$ order derivatives at $x=x_i$ uses three its $-x_i$ and the two adjacent points $x_{i-1}$ and $x_{i+1}.$

$\frac{d^{2}f}{d{x}^2}{|}_x|=x_i$~~$\frac{f_{i-1}-2f_i+f_{i+1}}{x^2}$

nember, $f_i=f(x_i)$ and $x_{i+j}=x_i-jx$ where $x_i$ are points$/$nodes on the mesh, $x$ is the ing between the points$/$nodes on the mesh and $j$ is an integer indicating how far apart the ts$/$nodes are.

leading term in the truncation error of the above approximation is of the order $x^2,$ i$.$e$.,$ the r is proportional to $x^2.$ For an approximation with higher accuracy $($assuming $x$ is small less than $1),$ we need more points instead of the $3$ above. The following is a central finite erence approximation with the truncation error of the order $x^4.$

$\frac{d^{2}f}{d{x}^2}{|}_x|=x_i$~~$\frac{-f_{i-2}+16f_{i-1}-30f_i+16f_{i+1}+16f_{i+1}-f_{i+2}}{12x^2}$

ewise, for $1^{st}$ order derivatives these would respectively be:

$\frac{df}{dx}{|}_x|=x_i$~~$\frac{f_{i+1}-f_{i-1}}{2x}$

$\frac{df}{dx}{|}_x|=x_i$~~$\frac{f_{i-2}-8f_{i-1}+8f_{i+1}-f_{i+2}}{12x}$

viema: Ouestions, Analysis a Solutions

$\frac{208}{293}$

$100\%$

o$*+$

B $6$

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Coses $$

$295$

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