Questions on 1997 HSC 7 b, induction? (1 Viewer)

[BmwLurker]

I was doing the 97 extention 1 paper yesterday and had trouble with question 7 b, both I and ii. I have looked at the answers in the back of the book; I don’t know really what it is, or how to do it. Any help would be greatly appreciated, the question is shown below.

(sorry for the large pic)

 

[Riviet]

Is this the Success book or another one? Because I thought the Success book explained it quite well.

edit: that was very quick vafa, and your attachments are very clear and easy to read!

 

[vafa]

Solution:

View attachment 14007

View attachment 14008

 

[BmwLurker]

Thanks for your quick replies. I have the mathematical association of nsw book. What I still don’t get is the brackets part, what does the top expression have to do with the bottom one of each bracket, is it similar to the one from question 5 b of that paper where

 

[vafa]

that is an old version of ncr

 

[Riviet]

( n ) = ⁿc_r
( r )

 

[BmwLurker]

Ok, thanks for your help I get it now