Harder 3U (1 Viewer)

[cutemouse]

Could someone please help me out?

Thanks

 

[Aerath]

It's really messy - but I hope you get the gist of it:

 

[cutemouse]

Hmm okay, how do you know that each term except the first and last cancels?

 

[Aerath]

Hmm okay, how do you know that each term except the first and last cancels?

Well I was sorta lazy cause I wanted to fit everything onto the page. But expand like the first three and the last three, and you'll notice that the last part of every 'term' is the negative of the first part of the next 'term'.