### Finding Limits for Equations

Please see file attached. Find Limit f'(x) as x--->0 Dear TA, I don' understand the answer where limit as x0- and lim as x0+ don't equal each other since one equals -∞ and the other +∞. At f'(0) the function is undefined. Do I need to use the def of limit and find the limit from the right side and left side.