csc212

Numerical Method

Hard Exam Preparation: 3 - 4 days
Question Papers (8)
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Numerical Method

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Section A

Answer any two questions.

1

How can  Horner’s rule be used to evaluate the f(x) and f(x) of a polynomial at a given point? Explain. Write an algorithm and program to calculate a real root of a polynomial using Horner’s rule.

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2

Write matrix factorization? How can be used to solve a system of linear equations? Factorize the given matrix A and solve the system of equations Ax = b for given b using L and U matrices.

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3

What is a higher-order differential equation? How can you solve the higher-order differential equation? Explain. Solve the following differential equation for 1 ≤ x ≥ 2, taking h = 0.25
, width y(1) = 1 and y‘(1) = 2

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Section B

Answer any eight questions.

4

How the half-interval method can be estimate a root of a non-linear equation? Find a real root of the following equation using the half-interval method to correct up to two decimal places.
x2 – e-x – x = 1

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5

Calculate the real root of the given equation using fixed point iteration correct up to 3 significant figures.
2x3 – 2x = 5

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6

What is Newton’s interpolation? Obtain the divided difference table from the following data set and estimate the f(x) at x = 2 and x = 5.

x f(x)
3.2 22.0
2.7 17.8
1.0 14.2
4.8 38.3
5.6 51.7

 

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7

What is linear regression? Fit the linear function to the following data

x f(x)
1.0 2.0
1.2 2.6
1.4 3.9
1.6 6.0
1.8 9.3
2.0 15.0
2.2 20.6
2.4 30.4

 

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8

What are the problems with polynomial interpolation for a large number of data set? How such problems are addressed? Explain with an example.

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9

Evaluate the following integration using Romberg integration.

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10

Solve the following set of linear equations using the Gauss-Jordan method.

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11

Solve the following differential equation for 1 ≤ x ≤ 2, taking h = 0.25 using Heun’s method.
y‘(x) + x2y = 3x, with y(1) = 1

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12

Consider a metallic plate of size 90cm by 90cm. The two adjacent sides of the plate are maintained at a temperature of 1000C and the remaining two adjacent sides are held at 2000C. Calculate the steady-state temperature at interior points assuming a grid size of 30 cm by 30 cm.

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