感觉挺难的。尤其是3.2-4, 我花了近2h做出来……还是参考了别人的解法的情况下。

3.2-1:

3.2-2:

3.2-3:

3.2-4:

3.2-5:

3.2-6:

3.2-7:

Reference:

Stirling's Approximation, in Wolfman World, retrieved on 20113514:35:08, from:

http://mathworld.wolfram.com/StirlingsApproximation.html

 

CLRS 2e: Exercise 3.2-4, in My Answers. BlogSpot, retrieved at 20113515:55:52, from:

http://answers-by-me.blogspot.com/2010/08/clrs-2e-exercise-32-4.html