BOS Trials 2013 2 Unit Discussion Thread (3 Viewers)

[iBibah]

How did Mathematics Extension 2 people find this exam?

We cannot judge the exam. The exam judges us.

 

[JT145]

Oh man. I felt so happy when I got the trig proof out. Was probably the only 2 mark question in the whole paper that I got right.

I remember nailing the sine rule question on Q 16 as well.

 

[Carrotsticks]

Oh man. I felt so happy when I got the trig proof out. Was probably the only 2 mark question in the whole paper that I got right.

I remember nailing the sine rule question on Q 16 as well.

Hehehe, almost seems TOO easy doesn't it?

Almost as if there's something that most students would miss out on...

 

[twinklegal19]

Hehehe, almost seems TOO easy doesn't it?

Almost as if there's something that most students would miss out on...

Oh crap, I knew it seemed too good to be true

Let me guess, using the sine rule can give 2 solutions right?

 

[Carrotsticks]

Oh crap, I knew it seemed too good to be true

Let me guess, using the sine rule can give 2 solutions right?

Nailed it.

 

[Examine]

We cannot judge the exam. The exam judges us.

^ This guy was having a great time, especially near the end.

 

[iBibah]

^ This guy was having a great time, especially near the end.

Being a habib isn't easy. Gotta rest up occasionally.

 

[JT145]

Where in relation to the room were you guys sitting

I was sitting right up the front, the Asian in the grey shirt and pants. The guy who arrived at 2:55.

 

[Trebla]

Oh crap, I knew it seemed too good to be true

Let me guess, using the sine rule can give 2 solutions right?

FYI I think this year's questions (especially 2U and Ext1) had a lot of 'traps' where students think they got the right answer when really they either got it wrong or only partially correct.

 

[RealiseNothing]

Where in relation to the room were you guys sitting

Across from this guy

I seriously skipped 1/2 of that, and of the half that I did do, i'd say I would have screwed up 1/2 of it! Aiming for a solid 25%! :O That goodness the HSC papers are pretty similar for year to year. I.e Same questions, just worded differently!

 

[Makematics]

FYI I think this year's questions (especially 2U and Ext1) had a lot of 'traps' where students think they got the right answer when really they either got it wrong or only partially correct.

Yep, i got tricked badly by Q9 MC in 3U
Any others from 3U?

 

[Makematics]

Where in relation to the room were you guys sitting

I was sitting right up the front, the Asian in the grey shirt and pants. The guy who arrived at 2:55.

I sat next to the guy with the snapback. The hardest part of the day was not understanding the insane maths questions, but understanding why one would wear a snapback during a maths test.

 

[twinklegal19]

Yep, i got tricked badly by Q9 MC in 3U
Any others from 3U?

Stuffed up Q8 in the MC as well
Did not think of letting the derivative be equal to zero for the limiting population in Q13 c) ii., I copied the wrong integral in Q13 b) iii, gave up on the projectile motion question + made tons of other sillies/skipped marks due to time urgh

edit: oops, just realised this is the 2U thread

 

[brownmanthinks]

when will the answers to this, be posted?

 

[Trebla]

Not for a while. If you have any particular questions you want solutions to now then I'll put them up.

 

[integral95]

Not for a while. If you have any particular questions you want solutions to now then I'll put them up.

14 b) iv - v - vi

 

[JT145]

I sat next to the guy with the snapback. The hardest part of the day was not understanding the insane maths questions, but understanding why one would wear a snapback during a maths test.

There were actually more Asian people than I thought

Probs all doing 4U though

I have that sinking feeling that I was probably the only person that was doing just 2U at that exam

inb410%

 

[iBibah]

There were actually more Asian people than I thought

Probs all doing 4U though

I have that sinking feeling that I was probably the only person that was doing just 2U at that exam

inb410%

nah you weren't, there were others.

 

[RealiseNothing]

14 b) iv - v - vi

14)b iv) y=mx passes through the origin. If you want to enclose an area you have to have 2 intersection points between the line y=mx and the curve

You can do this two ways, either find the gradient of the tangent to f(x) at x=0 then let m < gradient or solve the equations simultaneously and let the discriminant be positive for 2 solutions (i.e. 2 intersections). If you do the latter you will get a cubic, but note x=0 is an obvious solution so divide by x and get a quadratic.

 

[integral95]

14)b iv) y=mx passes through the origin. If you want to enclose an area you have to have 2 intersection points between the line y=mx and the curve

You can do this two ways, either find the gradient of the tangent to f(x) at x=0 then let m < gradient or solve the equations simultaneously and let the discriminant be positive for 2 solutions (i.e. 2 intersections). If you do the latter you will get a cubic, but note x=0 is an obvious solution so divide by x and get a quadratic.

Yup I recall doing the latter, (except I think I stuffed up the algebra cause I was kinda tired)