Official BOS Trial 2015 Thread (1 Viewer)

[leehuan]

I trusted my instincts to use u^2=sin(x). The problem was at the very start I was completely not tuned in to use it wisely enough. 1hr into the paper the integral started making sense.

Well that sucks, the polynomials question I got +- sqrt(2)

 

[Ekman]

Ah. Yes, you see, the values were , I made the mistake of reading the term as

Precisely this, the 3 values of p were 0,2,-2

 

[leehuan]

I rejected p=0

If p=0 then the polynomial was just p(x)=x^3 so the roots were 0 0 and 0 and that leaves the problem that 1/(alpha+beta)^2 = 1/(0+0)^2 = 1/0

 

[Ekman]

I rejected p=0

If p=0 then the polynomial was just p(x)=x^3 so the roots were 0 0 and 0 and that leaves the problem that 1/(alpha+beta)^2 = 1/(0+0)^2 = 1/0

That's correct, I had a feeling that I should of checked the values of p, well there goes a mark

 

[Paradoxica]

That's correct, I had a feeling that I should of checked the values of p, well there goes a mark

Ekman won't get 100% *audible gasp*

 

[Drsoccerball]

I got k =1 ? hbu guys?

 

[Ekman]

Ekman won't get 100% *audible gasp*

Unfortunately time was a major issue, in fact my working out for most questions was so messy and shocking, especially with the mechanics questions

 

[Paradoxica]

I got k =1 ? hbu guys?

1 is correct

 

[Drsoccerball]

1 is correct

I did binomial expansion and all are divisible by 3 except the last term and that is thus canceled by letting k=1

 

[Drsoccerball]

For question 11d was it Newtons method?

 

[Paradoxica]

I did binomial expansion and all are divisible by 3 except the last term and that is thus canceled by letting k=1

Dude, that's so tedious. Do you just binomial the shit out of everything you can?

 

[Librah]

I thought the 4u was easier this year

 

[Drsoccerball]

Dude, that's so tedious. Do you just binomial the shit out of everything you can?

No i just noticed that since one term is divisible by 3 and therefore anything to the power of it is also divisible by 3 except the last term.

 

[Mathsisfun15]

How did you fellas get the induction one?

 

[Ekman]

How did you fellas get the induction one?

The question 16 one for 4u?

 

[Drsoccerball]

How did you fellas get the induction one?

I was so stressed in ex 1 i skipped like everything...

 

[Mathsisfun15]

The question 16 one for 4u?

Nah I'm dumb. The 3U one.
I didn't attempt the 4U one.

 

[Mathsisfun15]

I was so stressed in ex 1 i skipped like everything...

same I couldn't focus and worked to slow. I will get like 20 something percent

 

[Mathsisfun15]

Did other people find this years paper for both 3 and 4U a fair bit harder than the 2012-14 BOS papers? IMO they have got harder each year

 

[Drsoccerball]

Did other people find this years paper for both 3 and 4U a fair bit harder than the 2012-14 BOS papers? IMO they have got harder each year

This years is the hardest