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Thanks so much! That was really helpful.

How would you get a general solution for a question like that though? I must admit I never thought of that method though, thanks for that!

Hey guys, I need help with these two questions: http://m.imgur.com/a/39Qms Any help would be greatly appreciated, thanks.

Hey can anyone help with these?

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Hey guys, I have a couple questions I'm kinda stuck on: 1. What steel products can be recycled relatively easily 2. Large quantities of lead are recycled. From what products is lead most easily recycled? 3. Why is it difficult to recycle zinc? I have some ideas, but I'm not confident at all...

Hey, can someone explain the locus questions such as arg(z-a)-arg(z-b)=θ, because I don't really understand them. Same with arg(z-a)+arg(z-b)=θ

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Hey, I need help with two questions: http://imgur.com/YmMw5kd http://imgur.com/hVWn0OS I only need help with a) ii) and c) iii) B), but the whole question is needed to solve it so I posted the whole thing. Thanks.

Here are the questions: http://m.imgur.com/scXruJa I'm not really sure how to start on the questions in 17, and I can't do 18.

Thanks a lot.

Oh did the answers mean: $$=\left(2^{2^n}+1\right)\left(2^{2^n}-1\right)$ when they wrote $$=\left(2^{n}+1\right)\left(2^{n}-1\right)$ And that's why they did F(n)[F(n)-2)

Hey, I'm trying to do a question but I keep getting a different answer for the first part: The answers say that F(n+1)-2=((2^n)+1)((2^n)+1) but when I was doing the question I got F(n+1)-2=((2^n+1)+1)((2^n+1)-1). Can someone show me how to get the answer, thanks.

q20 answers:

Thanks man, I'll check soon.

I didn't need all of the parts, no, just I thought it would help if I gave the full question.

Lol, is that a pun on series or something?

Hi, I have some questions that I have no idea how to do, here they are: http://m.imgur.com/Ro7qBgm Thanks

Thanks man, I could never get b) but that helped a lot.

No, that's the full question. By the way the answer for a) is (-1+root(5))/2, and b) is (3-root(5))/2, I just have no idea how to get there.