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March 29, 2024, 05:26:10 am

Author Topic: 3U Maths Question Thread  (Read 1230346 times)  Share 

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RuiAce

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Re: 3U Maths Question Thread
« Reply #735 on: October 05, 2016, 09:07:14 pm »
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wait i still don't get why you take the negative root, even tho k<2
Uhh I think that's wrong. You don't redefine the inverse function just like that. >_<

Because (k-2)2 > 0 even though k-2 < 0

Just use my working out.

massive

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Re: 3U Maths Question Thread
« Reply #736 on: October 05, 2016, 09:15:54 pm »
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Uhh I think that's wrong. You don't redefine the inverse function just like that. >_<

Because (k-2)2 > 0 even though k-2 < 0

Just use my working out.

i understand all your working except; since k-2<0 why do we take the negative branch of the abs(k-2) i.e. 2-k ?
« Last Edit: October 05, 2016, 09:31:52 pm by massive »

RuiAce

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Re: 3U Maths Question Thread
« Reply #737 on: October 05, 2016, 09:43:15 pm »
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i understand all your working except; since k-2<0 why do we take the negative branch of the abs(k-2) i.e. 2-k ?


massive

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Re: 3U Maths Question Thread
« Reply #738 on: October 05, 2016, 09:57:54 pm »
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ohhh lol my bad, thannkss

lha

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Re: 3U Maths Question Thread
« Reply #739 on: October 06, 2016, 09:19:09 pm »
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Could someone please help me with question 14b)iii) from the 2012 hsc paper? I have the solutions, i just dont understand it...

RuiAce

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Re: 3U Maths Question Thread
« Reply #740 on: October 06, 2016, 09:37:40 pm »
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Could someone please help me with question 14b)iii) from the 2012 hsc paper? I have the solutions, i just dont understand it...
Please send an image of the question for convenience in the future. Instructions on how to do so may be found here.










« Last Edit: October 06, 2016, 10:08:06 pm by RuiAce »

lha

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Re: 3U Maths Question Thread
« Reply #741 on: October 06, 2016, 10:02:37 pm »
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Please send an image of the question for convenience in the future. Instructions on how to do so may be found here.




(Image removed from quote.)

(Image removed from quote.)





Okay thanks! And yes ill make sure to attach a pic next time

16rf

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Re: 3U Maths Question Thread
« Reply #742 on: October 07, 2016, 10:17:11 am »
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Could anyone explain the answer to question 13)d)ii) of the 2012 HSC extension 1 exam.

RuiAce

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Re: 3U Maths Question Thread
« Reply #743 on: October 07, 2016, 10:35:46 am »
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Could anyone explain the answer to question 13)d)ii) of the 2012 HSC extension 1 exam.




lha

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Re: 3U Maths Question Thread
« Reply #744 on: October 07, 2016, 01:04:08 pm »
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Is there a set list of proofs that we need to know for circle geo?

jakesilove

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Re: 3U Maths Question Thread
« Reply #745 on: October 07, 2016, 01:09:00 pm »
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Is there a set list of proofs that we need to know for circle geo?

For sure; you can find a great summary HERE!
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RuiAce

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Re: 3U Maths Question Thread
« Reply #746 on: October 07, 2016, 01:09:56 pm »
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Is there a set list of proofs that we need to know for circle geo?
You may or may not be surprised, but check  the syllabus. Scroll to around page 28.

lha

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Re: 3U Maths Question Thread
« Reply #747 on: October 07, 2016, 01:18:56 pm »
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So much to remember  :'( but thank you RuiAce and jakesilove

jakesilove

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Re: 3U Maths Question Thread
« Reply #748 on: October 07, 2016, 01:22:38 pm »
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So much to remember  :'( but thank you RuiAce and jakesilove

No worries! There is a lot to remember, this is true, but there's also plenty of time before the exam :)
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Blissfulmelodii

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Re: 3U Maths Question Thread
« Reply #749 on: October 08, 2016, 03:02:53 pm »
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Hey,
I know this is probably really really simple but i wasn't in class when this was covered so i was just wondering if someone could explain how to find the value of this question to me?


--HSC subjects--
Music 1 | Biology | Society and Culture | Spanish Beginners | Math ext 1 & 2 | English Advanced | English ext 1 & 2