What is the -norm of [2215][2125] ?

a) 4

b) 7

c) 6

d) 3

The system of equations x₁+2x₂=1 and 2x₁+4.01x₂=2 has an exact solution at x₁=1 and x₂=0. What is the error magnification factor at the approximation solution x₁=3 and x₂=-1?

a) 200

b) 400

c) 100

d) 3612