411 REFERENCE · Wikibooks
HSC Mathematics Advanced, Extension 1, and Extension 2/3-Unit/HSC/Harder 2-Unit
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Some Harder 2 unit Problems:
See HSC 1998 Q 10 b
James Ruse 2003 Trial Paper Q 9 and 10
James Ruse 2006 Trial Paper Question 10
HSC 2001-2005 Q 10
HSC 2013 Q 10b
Sydney Grammar 2012,2013,2014 2 unit trial Q 16