Which of the dicontinuities are removable?

[screamtrumpet]

Homework Statement

Find the x values if any for which x is not continuous.Which of the dicontinuities are removable?

Homework Equations

f(x)=1/(x^2+1)

The Attempt at a Solution

Its unfactorable at the bottom ,i tried to factor it.Would this mean there are no discontinuities?

 

[Inferior89]

Are you sure you wrote down the problem correctly. It is undefined when the denominator is zero but x^2 + 1 is never zero. Or maybe the answer is that it is continuous everywhere.

 

[screamtrumpet]

thanks