Here is a problem I'm having trouble with:

Find big Oh and big Omega of log(n!)

I have tried Stirling's formula but I'm not sure that this is a satisfactory approach.

Any suggestions/help would be appreciated.

Thanks in advance.

The other problem is to solve the recurrence relation

T(n) = 3T(n/4)+n

I simply cannot see the approach required here to solve this.

Again any help would be appreciated.