well,
the hsc tests you looked out might not have had questions that directly have a log addition or something or something to do with e, but with integeration or app of calc in the physical world would have many logs in them
everything in ur maths book can be tested in the ext 1 exam...
What kind of question is this anyway?
If you cant do something like logs, you have no chance of being able to do harder things in 3u....
If you are worried about logs being in the HSC i suggest you drop the course..
I've seen something like Newtons method Q8 or maybe 7 in 4u hsc test. and 4u is more of a standalone subject than 3u.