Which of the following is not the property of continuous function if f(z) and g(z) are continuous on a region A, then ______________.
1
f(z) g(z) is continuous on A.
2
f(z) ∕g(z) is continuous on A except at points where g(z) = 0
3
(z) - g(z) is continuous on A .
4
f(z) + g(z) is continuous on A .