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March 29, 2024, 06:09:22 pm

Author Topic: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)  (Read 34760 times)

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atar27

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #15 on: October 26, 2016, 06:09:40 pm »
That was the worst exam ever!! OMG!

doyouevencheeto

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #16 on: October 26, 2016, 06:18:14 pm »
Can someone please tell me what 63% would align to?

Blissfulmelodii

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #17 on: October 26, 2016, 06:19:24 pm »
I am literally still trying to process that exam... nothing like the past papers i went through.

Why is the third MC A and not B??
--HSC subjects--
Music 1 | Biology | Society and Culture | Spanish Beginners | Math ext 1 & 2 | English Advanced | English ext 1 & 2

goandgoo

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #18 on: October 26, 2016, 06:20:18 pm »
The solutions are missing the last two parts (iii and iv) of Q14c

likeneverbefore

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #19 on: October 26, 2016, 06:20:50 pm »
hey sorry i was wondering why is MC q9 A and not B because at that point gradient is rise over run....therefore f'(1)=f(1)/1 = f(1)......doesn't that mean f'(1) <1?


jakesilove

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #20 on: October 26, 2016, 06:21:08 pm »
I am literally still trying to process that exam... nothing like the past papers i went through.

Why is the third MC A and not B??

Hey! Because that is the expansion of tan(A-B), not tan(A+B), so the answer will be tan(2x-x)=tan(x)
ATAR: 99.80

Mathematics Extension 2: 93
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Mathematics Extension 1: 98

Studying a combined Advanced Science/Law degree at UNSW

jakesilove

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #21 on: October 26, 2016, 06:21:47 pm »
The solutions are missing the last two parts (iii and iv) of Q14c

Yep! We're writing them out and uploading them as we speak... keep refreshing!
ATAR: 99.80

Mathematics Extension 2: 93
Physics: 93
Chemistry: 93
Modern History: 94
English Advanced: 95
Mathematics: 96
Mathematics Extension 1: 98

Studying a combined Advanced Science/Law degree at UNSW

jakesilove

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #22 on: October 26, 2016, 06:24:18 pm »
hey sorry i was wondering why is MC q9 A and not B because at that point gradient is rise over run....therefore f'(1)=f(1)/1 = f(1)......doesn't that mean f'(1) <1?

Hey! Rise over run doesn't work directly for curves like this; the gradient isn't necessarily less than one, just because the function has moved 1 to the right and is less than one up. This is a curve, not a straight line :)
ATAR: 99.80

Mathematics Extension 2: 93
Physics: 93
Chemistry: 93
Modern History: 94
English Advanced: 95
Mathematics: 96
Mathematics Extension 1: 98

Studying a combined Advanced Science/Law degree at UNSW

kevin217

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #23 on: October 26, 2016, 06:25:34 pm »
Love how the 2003 circle geo question was basically the same as this years

Blissfulmelodii

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #24 on: October 26, 2016, 06:38:55 pm »
Hey! Because that is the expansion of tan(A-B), not tan(A+B), so the answer will be tan(2x-x)=tan(x)

ohh wow I can't believe I did not notice that. Makes total sense now, wish i had  thought that through in the exam hahaha
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antonia98

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #25 on: October 26, 2016, 06:40:21 pm »
What would a raw mark of 68% scale to?

jakesilove

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #26 on: October 26, 2016, 06:50:39 pm »
What would a raw mark of 68% scale to?

Hey! There is a raw marks database you can find, and try to work stuff out, but honestly there is no way of knowing how scaling will effect your mark. There's also no point trying to figure it out; you'll get what you get. So, relax, and focus on the rest of your exams! Good luck
ATAR: 99.80

Mathematics Extension 2: 93
Physics: 93
Chemistry: 93
Modern History: 94
English Advanced: 95
Mathematics: 96
Mathematics Extension 1: 98

Studying a combined Advanced Science/Law degree at UNSW

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #27 on: October 26, 2016, 06:54:21 pm »
ohh wow I can't believe I did not notice that. Makes total sense now, wish i had  thought that through in the exam hahaha
Signs are annoying. But important.

Love how the 2003 circle geo question was basically the same as this years
Eh it wasn't identical. But I did realise the similarity after a bit.

The solutions are missing the last two parts (iii and iv) of Q14c
To further onto what Jake said these are now done

hey sorry i was wondering why is MC q9 A and not B because at that point gradient is rise over run....therefore f'(1)=f(1)/1 = f(1)......doesn't that mean f'(1) <1?
To further onto what Jake said, note that your method finds the GRADIENT of the line CONNECTING the points (1, f(1)) and (0,0). We want the gradient of the tangent, which doesn't pass through (0,0); this can be checked since that diagram WAS drawn to scale.

wesadora

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #28 on: October 26, 2016, 07:05:17 pm »
I have to say, the questions individually weren't too difficult, but I did feel a lot more restrained for time than in any other paper
lol really? It was cool i like it  8) u slow nerd
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hideakianon

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Re: Suggested Answers to the HSC 2016 Maths Extension 1 Exam (+Discussion!)
« Reply #29 on: October 26, 2016, 07:06:20 pm »
Do you guys know if there can be a penalty if you didn't draw the circle geo diagram?