Numerical Method
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Numerical Method
2078 Boards
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.
10
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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.
10
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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
10
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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
5
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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
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 |
5
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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 |
5
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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.
5
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9
Evaluate the following integration using Romberg integration.
5
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10
Solve the following set of linear equations using the Gauss-Jordan method.
5
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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
5
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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.
5
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