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April 24, 2024, 03:19:11 pm
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Author Topic: Extension 2 paper thoughts?  (Read 3420 times)  Share 

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APSODIFU

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Extension 2 paper thoughts?
« on: October 25, 2018, 05:40:58 pm »
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How did everyone view the extension paper?
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Bruh01

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Re: Extension 2 paper thoughts?
« Reply #1 on: October 25, 2018, 05:42:11 pm »
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I recken it was pretty difficult, i reckon the e4 would be around 65?
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envisagator

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Re: Extension 2 paper thoughts?
« Reply #2 on: October 25, 2018, 06:38:53 pm »
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it was hard, i fudged a lot of the proofs. Bit disappointed with cylindrical shells question, i got 32pi/105 but apparently it was 64pi/105 so sad.
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2018 HSC: English Standard          Mathematics EXT 1,2          Physics          Engineering Studies

APSODIFU

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Re: Extension 2 paper thoughts?
« Reply #3 on: October 25, 2018, 06:51:06 pm »
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Quote from: envisagator on October 25, 2018, 06:38:53 pm
it was hard, i fudged a lot of the proofs. Bit disappointed with cylindrical shells question, i got 32pi/105 but apparently it was 64pi/105 so sad.

Wait 64? I also got 32pi/105, was the integral (1-x)^2(root(x)) between 1 and 0?
« Last Edit: October 25, 2018, 06:52:57 pm by APSODIFU »
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sunshine32323123123123q3

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Re: Extension 2 paper thoughts?
« Reply #4 on: October 25, 2018, 07:05:37 pm »
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im really scared.. can someone pls tell the approximate E3 and E4 cut off for the exam
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maie

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Re: Extension 2 paper thoughts?
« Reply #5 on: October 25, 2018, 08:04:57 pm »
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Quote from: APSODIFU on October 25, 2018, 06:51:06 pm
Wait 64? I also got 32pi/105, was the integral (1-x)^2(root(x)) between 1 and 0?

wasn’t it 2 times that because the height of the shell was 2y? and hence 2(1-x)root(x)
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fkkiwi

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Re: Extension 2 paper thoughts?
« Reply #6 on: October 25, 2018, 08:06:00 pm »
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I got 64pi/105 as well since 2 areas
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HSC 2018: | English Advanced (91) | Extension 1 Maths (93) | Extension 2 Maths (86) | Physics (90) | Chemistry (92) | Studies of Religion 1 (47) |  ATAR: 98.70

2019: B. Eng (Hons) (Mechanical and Manufacturing Engineering) / Computer Science @UNSW

fkkiwi

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Re: Extension 2 paper thoughts?
« Reply #7 on: October 25, 2018, 08:06:47 pm »
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I think it was an alright exam, up until Q16 - that's when it really hit hard :( don't think I got many marks there
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HSC 2018: | English Advanced (91) | Extension 1 Maths (93) | Extension 2 Maths (86) | Physics (90) | Chemistry (92) | Studies of Religion 1 (47) |  ATAR: 98.70

2019: B. Eng (Hons) (Mechanical and Manufacturing Engineering) / Computer Science @UNSW

APSODIFU

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Re: Extension 2 paper thoughts?
« Reply #8 on: October 25, 2018, 08:31:17 pm »
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What did everyone get for the one multiple choice about the graph and it asked about the concavity?
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envisagator

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Re: Extension 2 paper thoughts?
« Reply #9 on: October 25, 2018, 08:38:34 pm »
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what was strange for me is that for the mathematical induction question 16.a, i couldnt prove the base case, even though it was simple cubic factorising, but still ended up proving it.

20 mins for the last question arhhhh
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2018 HSC: English Standard          Mathematics EXT 1,2          Physics          Engineering Studies

envisagator

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Re: Extension 2 paper thoughts?
« Reply #10 on: October 25, 2018, 09:48:16 pm »
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Quote from: APSODIFU on October 25, 2018, 08:31:17 pm
What did everyone get for the one multiple choice about the graph and it asked about the concavity?
The correct answer is B. I got solutions for exam from the coaching centre. Cant post it cause security period.
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2018 HSC: English Standard          Mathematics EXT 1,2          Physics          Engineering Studies

phunky

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Re: Extension 2 paper thoughts?
« Reply #11 on: October 25, 2018, 10:11:10 pm »
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Quote from: envisagator on October 25, 2018, 09:48:16 pm
The correct answer is B. I got solutions for exam from the coaching centre. Cant post it cause security period.

what was B again?
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envisagator

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Re: Extension 2 paper thoughts?
« Reply #12 on: October 25, 2018, 10:13:47 pm »
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Quote from: phunky on October 25, 2018, 10:11:10 pm
what was B again?
the solutions only contain the reasons to why its B. it doesnt come with the paper.
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2018 HSC: English Standard          Mathematics EXT 1,2          Physics          Engineering Studies

A Selective Student

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Re: Extension 2 paper thoughts?
« Reply #13 on: October 26, 2018, 03:27:37 pm »
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Felt the paper was just slightly harder than the past papers but Q1-15 were mostly doable. Question 16 was quite tough tho especially the triangle question, stumped most of the kids in my class.
Just hoping that my mark of approx 75 get's scaled up :(
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