The domain of a function f(x) is all the values x for which f(x) gives real values.
f(x)=(x-2)/(x^2-4)
=> (x - 2)/(x - 2)(x + 2)
=> 1/(x + 2)
This is not defined when x = -2
The domain is R - {-2}
algebra1
The domain of a function f(x) is all the values x for which f(x) gives real values.
f(x)=(x-2)/(x^2-4)
=> (x - 2)/(x - 2)(x + 2)
=> 1/(x + 2)
This is not defined when x = -2
The domain is R - {-2}