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# Mega A Level Maths Thread MK II watch

1. (Original post by Felix Felicis)
awesome xD
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Isn't that just the golden ratio
2. Interval bisection, oh how I've missed you -.-
3. (Original post by Felix Felicis)

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Evaluate
Just when I think I've got the hang of it you throw out a question which just puzzles me, hmm I'm going to get the answer even if it takes all night!
4. (Original post by Felix Felicis)

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Where are you getting these questions from?
5. (Original post by thers)
Where are you getting these questions from?
The first one is pretty common: golden ratio/phi.
6. It doesn't factorise so ima use the formula!
OR

I'm so slow
7. (Original post by thers)
Where are you getting these questions from?
Interwebz

(Original post by tigerz)
It doesn't factorise so ima use the formula!
OR

I'm so slow
Indeed but the second solution is sheer lunacy, no?
8. (Original post by Felix Felicis)

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Infinity. it's sqrt(10+10+100+1000+10000....... .)
9. (Original post by Felix Felicis)
Interwebz
What site?
10. (Original post by reubenkinara)
The first one is pretty common: golden ratio/phi.
Yes, I thought about phi when I saw 1.618
11. (Original post by MAyman12)
Infinity. it's sqrt(10+10+100+1000+10000....... .)
It's not that, there's a repeating square root and it's not sqrt(10 + 10 + 100 + 1000 + 10000) it's sqrt(10 + sqrt(100 + sqrt(10000 + sqrt(100000000 + ...(i.e. the number of zeros double each time)
12. (Original post by MAyman12)
What site?
Not even a specific site, I just see them scattered around random maths fora when I google maths problems xD Try Math Help Forum
13. Here's a good tip on how to find out if a quadratic factorises or not: If you do and it equals a square number () then it can be factorised otherwise it can't
14. (Original post by Felix Felicis)
It's not that, there's a repeating square root and it's not sqrt(10 + 10 + 100 + 1000 + 10000) it's sqrt(10 + sqrt(100 + sqrt(10000 + sqrt(100000000 + ...(i.e. the number of zeros double each time)
Isn't it all the same at the end, Sum to infinity? What about a hint.

Will it end up as sqrt20 or sqrt(10+10+10+10....)
15. (Original post by Felix Felicis)
...
Could you give me a little pointer in this question as what I've been doing is x = sqrt(10+x^2) which is complete rubbish as 10 = 0 from it.
16. (Original post by MAyman12)
Isn't it all the same at the end, Sum to infinity? What about a hint.
Yes, it is a sum to infinity but it converges

Try testing for small powers of 10
17. (Original post by MathsNerd1)
Could you give me a little pointer in this question as what I've been doing is x = sqrt(10+x^2) which is complete rubbish as 10 = 0 from it.
Try testing for small powers of 10 and see how the expression simplifies
18. (Original post by Felix Felicis)

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Pf, at least make the result pretty Felix:

... or something
19. (Original post by Felix Felicis)

Indeed but the second solution is sheer lunacy, no?
OH yeah, is it because all the ones are positive, so x can't be negative? +/+=+ lols

Also am I heading in the right direction in saying:

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then simplifying further by doing some cancelling?

BRB, gonna take my dog to the park lols
20. (Original post by Felix Felicis)
Yes, it is a sum to infinity but it converges

Try testing for small powers of 10
(1+sqrt(41))/2

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