General Thoughts: Mathematics Extension 1 (4 Viewers)

[Tasha270494]

Re: Wow, fuck that

I think for a rates q. (when l=2) I got -40pi^2 or something.. can't remember

 

[Riku123123]

Re: Wow, fuck that

okay I'm a 4u student and I found this really hard. What was the restriction on the y coordinate for 3biv?
and how did people do ii) and iii) of the circle geo? I found that harder than the 4u circle geo o.o
hoping for 60/84

the 2nd part of circle geo was
angle dab =angle dba (angles of isos. triangle)
angle adc=2x (angle sum of ext triangle)
angle cda = angle aod =2x (proven)
therefore cycli quad (angle in same seg in cycli quad are equal

3rd part

am=ac
therefor mo is a straight line (cuz of that chord thing )

 

[oscarmanutdfan]

Re: Wow, fuck that

It felt like a slightly easier SGS trial. Hopefully I got a decent Band E3.

 

[MATHSCAPE]

Raw Marks
HERE ARE THE RESULTS I PUT TOGETHER FROM User-blackratpoo

Mathematics Extension 1*
Year Raw Mark /84 . . TWM (with optional scaling) . TWM (one unit basis) . . Aligned Mark . . . Aligned Mark . . . Reported Exam Mark . . Band
2009 . . . . 67 . . . . . . . . . . 67 . . . . . . . . . . . . . . . . 39.9 . . . . . . . . . . . . . 47 . . . . . . . . . 94 . . . . . . . . . . . 94 . . . . . . . . . E4
2009 . . . . 57 . . . . . . . . . . 57 . . . . . . . . . . . . . . . . 33.9 . . . . . . . . . . . . . 45.2 . . . . . . . . . 90.4 . . . . . . . . . . . 90 . . . . . . . . . E4
2004 . . . . 74 . . . . . . . . . . 74 . . . . . . . . . . . . . . . . 44.0 . . . . . . . . . . . . . 48.1 . . . . . . . . . 96.2 . . . . . . . . . . . 96 . . . . . . . . . E4
2009 . . . . 70 . . . . . . . . . . 70 . . . . . . . . . . . . . . . . 41.7 . . . . . . . . . . . . . 47.5 . . . . . . . . . 95 . . . . . . . . . . . 95 . . . . . . . . . E4
2010 . . . . 68 . . . . . . . . . . 68 . . . . . . . . . . . . . . . . 40.5 . . . . . . . . . . . . . 47.3 . . . . . . . . . 94.6 . . . . . . . . . . . 95 . . . . . . . . . E4
2010 . . . . 74 . . . . . . . . . . 74 . . . . . . . . . . . . . . . . 44.0 . . . . . . . . . . . . . 48.3 . . . . . . . . . 96.6 . . . . . . . . . . . 97 . . . . . . . . . E4
2010 . . . . 49 . . . . . . . . . . 49 . . . . . . . . . . . . . . . . 29.2 . . . . . . . . . . . . . 42.4 . . . . . . . . . 84.8 . . . . . . . . . . . 85 . . . . . . . . . E3

still hope for an E4!!

 

[Riku123123]

Re: Wow, fuck that

Didn't you just have to differentiate the volume with respect to l? Ie. Take h as a constant.

And overall I thought the exam was pretty doable. There was nothing obscenely hard, it just required more time to nut stuff out. Fingers crossed for 75+/84

oh crap...i thought implicit differentiation was only in 4u course not in 3u...

 

[damo_g]

1/3 actually normally 2 for working out 1 for final answer

So wouldn't i get 2 marks then? Because i got the correct negative time but didn't subtract it from 10am?

 

[Nympha]

Re: Wow, fuck that

okay I'm a 4u student and I found this really hard. What was the restriction on the y coordinate for 3biv?
and how did people do ii) and iii) of the circle geo? I found that harder than the 4u circle geo o.o
hoping for 60/84

For part ii), you had to use the sum of interior opposite angles = exterior angle (since it was isosceles) - this ended up = 2x, and since angles in same segment are =, it was cyclic.
For the last part, I *think* it was that line from centre of circle which bisects a chord is perpendicular to it.. so therefore the line through P and M to the circle is a radius, so therefore OPM is a straight line or something. Idk, not sure if i got that one right.

 

[failwhale]

Re: Wow, fuck that

LOL WTF IS THIS SHIT
THE COMMITTEE ON THE 3U AND 4U PANEL ARE FUCKING CRAZY

i effed up everything, lucky to get 60+

 

[damo_g]

Re: Wow, fuck that

I think for a rates q. (when l=2) I got -40pi^2 or something.. can't remember

Can't remember exactly but i remember the -40.

 

[salih08]

Re: Wow, fuck that

What was the total distance traveled between the 2 times for the SHM question???4?

 

[Wight]

Re: Wow, fuck that

Can't remember exactly but i remember the -40.

-40pi?

 

[Nympha]

Re: Wow, fuck that

oh crap...i thought implicit differentiation was only in 4u course not in 3u...

Yeah, implicit is only in 4 unit. But this isn't implicit - all you're doing is differentiating the volume with respect to l, so you treat h as a constant.

 

[HyperComplexxx]

Re: Wow, fuck that

haha we are the year that gets experimented on...
Naplan, Ellla ? and some more lul
Weird exam structure too

 

[failwhale]

Re: Wow, fuck that

I think for a rates q. (when l=2) I got -40pi^2 or something.. can't remember

yeah that's what i got lolollolo

 

[nano2e]

Re: Wow, fuck that

uh oh, for the time question, where the answer is 8:46am. I think I might have put 8:48am, due to a calculation error when subtracting the time lol. Will I still get the 3 marks? (with all the working shown)

 

[failwhale]

Re: Wow, fuck that

haha we are the year that gets experimented on...
Naplan, Ellla ? and some more lul
Weird exam structure too

i know hey, goddamn it i just want to get into mycourse ((((

 

[gunat61]

hope i get an E3 - stuffed it soo bad

 

[Nympha]

Re: Wow, fuck that

What was the total distance traveled between the 2 times for the SHM question???4?

I think the consensus was that it was 8. I stuffed it up and wrote 4, dammit.. I forgot that 1 period = travel to both extremities and back. Bahhhh.

 

[functiom]

Re: Wow, fuck that

HAHAHA... someone post up the paper already. I wanna see how easy it is!

I can already pretty much gaurantee anyone that took my help would have got at least 115/120 raw for 2unit (within like 30minutes lolololol). I literally scrolled through that 2unit paper in 10 minutes and could literally see all the solutions in my head immediately LOLOLOL. There were only 5 five marks in the whole paper that required any thought at all (and even they weren't too hard).

Someone upload the 3unit paper so I can see how easy it is. I don't want to read what questions you guys are posting because then that will give me hints with regard to the questions.

Still. I reckon I could have safely gauranteed ANYONE 74/84 raw mark for 3unit.

 

[friend177]

Re: Wow, fuck that

uh oh, for the time question, where the answer is 8:46am. I think I might have put 8:48am, due to a calculation error when subtracting the time lol. Will I still get the 3 marks? (with all the working shown)

If the marking criteria doesn't said it needs a correct answer then possibly basically te markers will know what you're trying to do however it really depend whether they're lineant or not maybe 2 maybe 3.