The homework question states:
Determine whether the infinite integral converges or diverges. Explain the outcome of your calculation, using a sketch (representing a domain of the form [1,a] for a suitable large value a) of the graph of .
How does a graph help explain, better put, what am I looking for in this graph and how am I supposed to use it? (I've read my notes over and over, but they still make no sense...)
I understand that the integral = sin(ln(x))....
With regards to [1,a], isn't a=lower bound of the integral? i.e. a=1?
Thanks in advance