
3 Discrete Math Problems
Here's a few discrete math problems. I just threw them up in photoshop so it looks clean. For those of you who help me out with these, please do your best to explain thoroughly. I'm going to be tested on similar problems on Monday, so i really need to understand the process.
These are the only 3 out of 20 i need help on, so I guess i'm doing alright
http://img256.imageshack.us/img256/1539/math1hz1.jpg
thanks guys

well it looks like i didn't give the right first problem. The (1) on the right is supposed to be (1)^n.
anyways, i've gotten number 1 somewhat done. I set n = 0, and that checked out, then I got n = k, and then did the k+1. What I'm left with now is the following.
... = ((2^(k+1))/(3*2^k)) + (((1)^k)/(3*2^k)) + (1/2)^(k+1)
I'm really not sure what to do after this point...
thanks