harpazo
Full Member
- Joined
- Jan 31, 2013
- Messages
- 891
Given f(x) = 5/(x^2 + 1), the domain is all real numbers but I do not know the reason why that is the case.
For rational functions, we set the denominator equal to 0 and solve for the variable. If we set the given denominator to be 0, the following happens:
x^2 + 1 = 0
x^2 = - 1
Stuck here....
For rational functions, we set the denominator equal to 0 and solve for the variable. If we set the given denominator to be 0, the following happens:
x^2 + 1 = 0
x^2 = - 1
Stuck here....