1. consider the linear system ax=b for which the inverse of a is give by

A^-1=(0.1,0.1,0.1),(0.1,0.15,0.15),(0.1,0.15,0.25)

if b1 in the vector b doubles while b2 and b3 remain fixed, then the largest imapct will be on

a) x1

b) x2,

c) x3

d) same impact on all

2. Which on the following statements is true for linear system of equation?

a) in solving one system of equation, guass elimination is more efficient than gauss jordan elimination

b) in finding the matrix inverse, gauss jordan is more efficient than gauss elimination

c) statement a and b are both correct

d) none of the above