Science:Math Exam Resources/Courses/MATH110/December 2013/Question 01 (c)/Solution 1
False: To hunt for discontinuities, we have to check inside each piece and also at the boundary.
For the boundary to be continuous, we must have:
So the limits exists and is equal to which happens to be . So the function in continuous at the boundary.
On the right of , the function is continuous since is only undefined for which is not covered by this case.
On the left of , the function is discontinuous at since the denominator is . This fall inside the region considered. So is discontinuous at .
That means is NOT continuous over all real numbers.