HSC Mathematics Advanced, Extension 1, and Extension 2/3-Unit/HSC/Harder 2-Unit

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