Ran in to a couple snags on this take home final for a math course I'm taking.

1) [Sigma(sum)] n=1 to (infinity) cos n/ n


a) Prove the series is convergent

b) Prove the series is not absolutely convergent




2) Suppose a matrix A satisfies A^2 = A. What are possible eigenvalues of A? Prove your claim.







If anyone knows how to get started on either of these problems I'd greatly appreciate it.

 

what math is this? i could possibly do a) and b) but i wouldnt know how to set up the diff eq for c

 

[QUOTE]
1) [Sigma(sum)] n=1 to (infinity)

 

- like I have any ing clue what the hell you guys are even talking about!

 

This is one retarded math course. The first half of the class is Linear Algebra and the second half is infinite series stuff (with a packet written by a professor at the university as text, worst material ever to try and learn infinite series). Thanks a lot Frycow, I have some sort of direction to go now. I might have some more questions later .

 

PM magician if you have any other problems, if he's online he'll help, I think he's a math teacher or something

 

[QUOTE]Originally posted by frycow

 

math is just a trend....

skip it and go drinking.

 

[QUOTE]Originally posted by jsc2K

 

[QUOTE]Originally posted by jsc2K