calculas problems

[jiggamanjatt7]

1. determine whether the sequence whose nth term is lnn! - (n +1/2) lnn + n converges or diverges.

2.determine whether

a) reciprocal of positive concave functions are convex.

b) reciprocals of positive convex functions are concave

c) there exists a concave function f: R++ => R such that f(x) is less than or equal to ln for all XER++

 

[pka]

Why don’t you rewrite that posting to make it readable?
You have used no parentheses!
Does lnx mean ln(x)?
If so then clean up your notation.
If you cannot use TeX, at least try to make your post readable.