This problem appeared on the first test in differential calculus. Since it does not involve any calculus I am hoping this is the right place to present it.
For this problem, consider f(x) = / x + 2 / / (x + 2)
If f(x) is expressed without absolute value, f(x) = ?
EVERYONE including me, thinks it should be = 1 The professor says it is equal to 1 or -1.
Can someone please explain why? We are also suppose to determine the intervals where f(x) is continuous. Again, I do not understand why they are from negative infinity, - 2 union with (-2, infinity)
Any help would be much appreciated. Frostking