Question

Let the i^th equation of a system of n equations be aiΦi=bi Φi+1+ciΦi-1+di. Which of these is correct?

(a) cN=0; bN=0

(b) cN=0; b1=0

(c) c1=0; bN=0

(d) c1=0; b1=0

This question was addressed to me in an international level competition.

The above asked question is from Discretization Aspects in section Basic Aspects of Discretization, Grid Generation with Appropriate Transformation of Computational Fluid Dynamics

Answer 1

Right answer is (c) c1=0; bN=0

Easiest explanation: Node 1 will not have a previous node (c1=0). The last node will not have the next node (bN=0).