Which textbooks have this topic?

[arii]

Hey everyone,

I had a quick question. Which textbooks have stuff regarding Harder Extension 1 Topics? I don't want to go through all the topics again but apparently, some textbooks have a section completely dedicated to this..

Thanks in advance.

[Yagami Light]

Harder 3U topics is a 4U topic. Unless you are doing extension 2 mathematics you do not need to revise this topic. Although the Cambridge 4U textbook has the harder 3u topics as a chapter if thats what you are looking for.