Okay, so my alarm clock magically didn't go off this morning and I missed calculus (my first class missed of the year, grr!) :( Unfortunately the teacher went over limits today and we have work due this weekend online with limits and I don't have class tomorrow. I'm having trouble figuring out how to solve these problems. Can someone help? 1. The problem statement, all variables and given/known data The first one is really confusing, it is just a graph and it says Use the figure below to give an approximate value for the limit lim f(x) (if it exists). x[tex]\rightarrow[/tex]1 http://img121.imageshack.us/img121/1862/picture4r.png [Broken] There is another problem just like this one. Then there is another graph problem but it is different, now I'm really confused. It says to estimate the limits using the graphs. http://img4.imageshack.us/img4/4196/picture5ju.png [Broken] I'm supposed to find: lim ( f (x) + g (x))= x[tex]\rightarrow[/tex]5^- lim ( f (x) + 8g(x))= x[tex]\rightarrow[/tex]5^+ Another thing I don't get is the x[tex]\rightarrow[/tex]5's have + and -. What in the Universe does that mean? The last problem is yet again different. No graph for this one. It just says to find a value of the constant k such that the limit exists for the given function. http://img156.imageshack.us/img156/7294/picture6rn.png [Broken] http://img156.imageshack.us/img156/6981/picture7ki.png [Broken] 2. Relevant equations 3. The attempt at a solution I know this may seem like a lot to ask, but I really need help to understand this, and I'm not just some lazy person who missed a class because I didn't feel like getting out of bed. I have literally been studying physics most of the week and getting to bed late. Thanks ahead of time to anyone who is willing to help explain how this works.