BIT 3rd Semester
Numerical Method Board Question Paper 2078

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BIT 203-2078 ✡

Tribhuvan University

Institute of Science and Technology

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Bachelor Level/Second Year/Third Semester/Science
Bachelors in Information Technology (BIT 203)
(Numerical Method)
Full Marks: 60 Pass Marks: 24 Time: 3 hours

Candidates are required to give their answers in their own words as far as practicable.
The figures in the margin indicate full marks.

Section A
Long Answer Questions
Attempt any Two questions.
[2x10=20]
1.

Derive the formula for integration using Simpson's 3/8 rule. Use Secant Method to estimate the root of equation \(x^2 - 4x - 10 = 0\), with initial estimate \(x_1 = 4\) and \(x_2 = 2\).

2.

What do you mean by boundary value problem? Use shooting method, solve the equation:
\(y'' = 6x^2\), with \(y(0) = 1\) and \(y(1) = 2\) in the interval \((0, 1)\) for \(y(0.5)\) taking \(h = 0.5\).

3.

Write an algorithm and program to compute the interpolation using Lagrange Interpolation.

Section B

Attempt any Eight questions

[8×5=40]
4.

Show that the rate of convergence of Newton's Raphson method is quadratic.

5.

The temperature of a metal strip was measured at various time intervals during heating and the values are given in the table below.

Time('t' min)1234
Temp('T' °C)7083100124
If the relation between the time 't' and temperature 'T' is of the form: \(T = be^{t/4} + a\). Estimate the temperature at \(t = 6\) minute.

6.

Given the following set of data points. Obtain the table of divided difference and use that table to estimate the value of \(f(1.5)\).

x12345
\(f(x) = x^3 - 1\)072663124

7.

Solve the following system of linear equation by Gauss Elimination with Pivoting.
\(2x + 2y + z = 6\)
\(4x + 2y + 3z = 4\)
\(x - y + 1 = 0\)

8.

Determine the Eigen Values and corresponding Eigen Vectors for the matrix.
\[A = \begin{bmatrix} 1 & 6 & 1 \\ 1 & 2 & 0 \\ 0 & 0 & 3 \end{bmatrix}\]

9.

The table below gives the values of distance travelled by a car at various time intervals during the initial running.

Time('t' sec)56789
Temp('T' °C)10.014.519.525.532.0
Estimate the velocity and acceleration at time \(t = 7\) sec.

10.

Solve the following integral using trapezoidal rule for \(n = 8\).
\[I = \int_{2}^{4} (x^4 + 1)\, dx\]

11.

Given the equation \(y' = 3x^2 + 1\) with \(y(1) = 2\), estimate \(y(2)\) by Euler's Method using \(h = 0.2\).

12.

Solve the Poisson's Equation \(\nabla^2 f = 2x^2y^2\) over the square domain \(0 \leq x \leq 3\) and \(0 \leq y \leq 3\) with \(f = 0\) on the boundary and \(h = 1\).