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# Mega A Level Maths Thread MK II watch

1. (Original post by Robbie242)
Hmm pondering on how to get the result root 10 other than that assumption/test, how would I necessarily be able to evaluate that, if its 1-r on the denominator for sinfinity for x/root 10 then that would equal 0 and thats bad. Hmm I'm not entirely sure, any hints felix?

And also its the sum to infinity to this suggests 1+1+1+1.... with roots blahblah which certainly can't equal 1
The sum isn't equal to root10. Also, can I point out guys, you can't evaluate this using the infinite geometric series formula because each successive term is inside a new radical

You just need to evaluate and you're done - the answer isn't root 10 but it is root 10 * something (which is what you need to evaluate)
2. (Original post by Felix Felicis)
Spoiler:
Show

So you took sqrt10 as common factor which left you with phi so the answer is phi*sqrt10. I could've never thought about that. Genius
3. (Original post by tigerz)
I swear it simplifies as you go along?

Felix your maths questions are just one of a kind lols
Not sure tbh

I do like them though, pushing me away from A-level learning at least, I'll never be told to prove something by induction or show that (equation or something is given by) at an interview
4. (Original post by Felix Felicis)
The sum isn't equal to root10. Also, can I point out guys, you can't evaluate this using the infinite geometric series formula because each successive term is inside a new radical

You just need to evaluate and you're done - the answer isn't root 10 but it is root 10 * something (which is what you need to evaluate)

Stupid question but how would I evaluate such a thing, if it goes on until infinity lol
5. (Original post by MathsNerd1)
Indeed as I could only imagine how much the question was annoying you and yeah, I tend to do that all the time but now I'm purposely trying to make an easier question harder for some sheer fun
Yeah it was, thank you btw haha enjoy
Its difficult trying to jump between the two subjects >.<
6. (Original post by Robbie242)
Stupid question but how would I evaluate such a thing, if it goes on until infinity lol
Can you see a repeating unit anywhere inside the first square root? Try setting it equal to 'y' or something

(Not a stupid question btw, that's the whole point of the question )
7. (Original post by MAyman12)
So you took sqrt10 as common factor which left you with phi so the answer is phi*sqrt10. I could've never thought about that. Genius
Well, that's what makes it a problem rather than an exercise.
8. (Original post by Felix Felicis)
Can you see a repeating unit anywhere inside the first square root? Try setting it equal to 'y' or something

(Not a stupid question btw, that's the whole point of the question )
1 ? :s
9. (Original post by Robbie242)
Not sure tbh

I do like them though, pushing me away from A-level learning at least, I'll never be told to prove something by induction or show that (equation or something is given by) at an interview
Yeah defo! its interesting

And ohh! it uses the same concept as the first question he set!!!
10. (Original post by Robbie242)
1 ? :s
Hint

Spoiler:
Show
Let Can you see a repeating unit anywhere in here?

Big hint

Spoiler:
Show
Try squaring both sides

Huge hint

Spoiler:
Show
11. (Original post by tigerz)
Yeah it was, thank you btw haha enjoy
Its difficult trying to jump between the two subjects >.<
Its fine, I just like to help out others And yeah, it really is that's why I'll be glad later on in the year that I'll only be doing Maths for the next 4 years
12. (Original post by MathsNerd1)
Its fine, I just like to help out others And yeah, it really is that's why I'll be glad later on in the year that I'll only be doing Maths for the next 4 years
awwh Haha unless you also do a maths based job Then you'll be doing it for a while!
But I get what you mean
13. (Original post by Felix Felicis)
Hint

Spoiler:
Show
Let Can you see a repeating unit anywhere in here?

Big hint

Spoiler:
Show
Try squaring both sides

Huge hint

Spoiler:
Show
I don't know if this is a stupid suggestion ?

I don't know how exactly you'd square it lol, does it just get rid of the large sqrt surrounding the whole thing?

i.e.
14. (Original post by Felix Felicis)
...
Teach me your ways oh great one
15. (Original post by Felix Felicis)
Well, that's what makes it a problem rather than an exercise.
But how is the nested square roots equal phi?
16. (Original post by tigerz)
awwh Haha unless you also do a maths based job Then you'll be doing it for a while!
But I get what you mean
Well who knows it really depends on how I find it all at university It should be some great fun though
17. (Original post by Robbie242)
I don't know if this is a stupid suggestion ?

I don't know how exactly you'd square it lol, does it just get rid of the large sqrt surrounding the whole thing?
No xD Squaring it once would get rid of the biggest square root, yes After that, it should fall out nicely

(Original post by MathsNerd1)
Teach me your ways oh great one
I'm not all that. xD

(Original post by MAyman12)
But how is the nested square roots equal phi?
What's ?
18. (Original post by MathsNerd1)
Well who knows it really depends on how I find it all at university It should be some great fun though
Yeah, just see where you end up :P
19. (Original post by Felix Felicis)
I'm not all that. xD
Still you're better than me so I'd like to learn from you and others to help me improve my mathematical ability
20. (Original post by Felix Felicis)
No xD Squaring it once would get rid of the biggest square root, yes After that, it should fall out nicely

I'm not all that. xD

What's ?
? Why isn't it infinity its sqrt1 + sqrt1 infinite times, just why?

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