# Numerical Methods - Numerical Methods MCQ

6:

In the Gauss elimination method for solving a system of linear algebraic equations,triangularzation leads to

 A. Diagonal matrix B. Lower triangular matrix C. Upper triangular matrix D. Singular matrix Answer Report Discuss Option: C Explanation : Click on Discuss to view users comments. Write your comments here:
7:

If   Δf(x)  =  f(x+h) - f(x), then a constant k, Δk equals

 A. 1 B. 0 C. f(k)- f(0) D. f(x + k) - f(x) Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
8:

Double (Repeated) root of
4x3- 8x2- 3x + 9 = 0 by Newton-raphson method is

 A. 1.4 B. 1.5 C. 1.6 D. 1.55 Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
9:

Using Bisection method, negative root of x3 - 4x + 9 = 0 correct to three decimal places is

 A. -2.506 B. -2.706 C. - 2.406 D. None of these Answer Report Discuss Option: B Explanation : Click on Discuss to view users comments. Write your comments here:
10:

Four arbitrary points (x1, y1), (x2, y2), (x3, y3),(x4, y4) are given in the x, y-plane. Using the method of least squares, if regressing y upon x gives the fitted line y = ax + b; and regressing y upon x gives the fitted line y + ax + b; and regressing x upon y gives the fitted line
x = cy + d, then

 A. Two fitted lines must coincide B. Two fitted lines need not coincide C. It is possible that ac = 0 D. A must be 1/c Answer Report Discuss Option: D Explanation : Click on Discuss to view users comments. Write your comments here: