Bachelors Level/Second Year/Third Semester/Science bit/third semester/numerical methods/syllabus wise questions

Bachelors In Information Technology

Institute of Science and Technology, TU

Numerical Methods (BIT203)

Year Asked: 2080, syllabus wise question

Interpolation and Regression
1.
Fit a second order polynomial to the data in the table below:
X12345F(x)26122030\begin{array}{|c|c|c|c|c|c|}\hline X & 1 & 2 & 3 & 4 & 5 \\ \hline F(x) & 2 & 6 & 12 & 20 & 30 \\ \hline \end{array}
[5]
Numerical Differentiation and Integration
1.
Solve the double integration using Simpson's 1/3 rule. 22.644.4dxdyxy\int_{2}^{2.6} \int_{4}^{4.4} \frac{dxdy}{xy} [5]
2.
Why Numerical Integration is required? Compute the integral: I=11exdxI = \int_{-1}^{1} e^x dx using composite trapezoidal rule for n = 4. [5]
3.
Evaluate dydx\frac{dy}{dx} at x = 5 using Newton's forward interpolation formula using the following table.
X13579y1.2012.80119.60472.801302.80\begin{array}{|c|c|c|c|c|c|}\hline X & 1 & 3 & 5 & 7 & 9 \\ \hline y & -1.20 & 12.80 & 119.60 & 472.80 & 1302.80 \\ \hline \end{array}
[5]
Solution of Nonlinear Equations
1.
Write an algorithm and a C-Program to obtain roots of non-linear equation using Newton Raphson Method. [10]
2.
Use secant method to estimate the root of the equation x25x+6=0x^2-5x+6=0, with initial estimate x1=4x_1 = 4 and x2=2x_2 = 2 (EPS=0.05). [5]
3.
What are the sources of errors? Discuss various types of errors encounters in numerical computation. [5]
Solution of Ordinary Differential Equations
1.
Solve the following ordinary differential equation using shooting method. y+xyxy=2xy'' + xy' - xy = 2x with boundary conditions y(0)=1y(0)=1 and y(2)=10y(2)=10 [10]
2.
Solve the following differential equation dydx=3x+y2\frac{dy}{dx} = 3x + \frac{y}{2} with y(0)=1y(0) = 1 for x=0.2(h=0.1)x = 0.2 \quad (h = 0.1) using Euler's Method. [5]
Solution of Partial Differential Equations
1.
Solve the Poisson's equation 2f/x2+2f/y2=2x2y2\partial^2f/\partial x^2+\partial^2f/\partial y^2 = 2x^2y^2 over the square domain 0<=x<=3 and 0<=y<=3 with f=0 on the boundary and h = 1. [5]
Solving System of Linear Equations
1.
Compare and contrast between Jacobi iterative methods and Gauss Seidal method? Solve the following equation using Gauss Seidal method. x+2y+3z=5,2x+8y+22z=6x+2y+3z = 5, 2x+8y+22z = 6 and 3x+22y+82z=103x+22y+82z = -10 [10]
2.
Find the Eigen values and Eigen vectors of the Matrix: A=[31 11]A=\begin{bmatrix} 3 & -1 \\\ 1 & 1 \end{bmatrix} [5]