Math 140 Exam #2 Oct 23,1992 Professor: Berg Assistants: AI-Khal, Gurski, Li Your name Instructions: Circle the name of your assistant on the front sheet. Write your own name at the top of every sheet. vVork each problem in the space provided (if more space is needed, work on the back of the same sheet, and clearly indicate that such work is to be considered as part of your solution). When calculation is needed, you must show that calculation as part of your solution. If ~:uch calculation is not shown, an answer may not be given credit even if it is correct. Present your work as clearly as you can. An incorrect answer may receive partial credit if the approach is correct and if we can figure out what you have done. Caution: You must neither give nor receive help of any kind from another student during this exam. If a question arises, summon a proctor. 1. (40 points, 10 points per part) Calculate the indicated derivatives: a. f(x) = xsinylx. Find f'(x). b. f(x) = tan2x. Find f"(f;...