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March 28, 2024, 08:44:19 pm

Author Topic: Mathematics Question Thread  (Read 1296640 times)  Share 

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jamonwindeyer

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Re: Mathematics Question Thread
« Reply #390 on: September 19, 2016, 06:56:19 pm »
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How many past papers shpuld we complete before hsc?

I think that depends on the person! I personally did over 20, but that was probably excessive,  do however many you think you need to!! Your aim should be to be able to know how to do almost any question on sight ;D

jakesilove

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Re: Mathematics Question Thread
« Reply #391 on: September 19, 2016, 07:05:15 pm »
+1
I think that depends on the person! I personally did over 20, but that was probably excessive,  do however many you think you need to!! Your aim should be to be able to know how to do almost any question on sight ;D

Like Jamon says, it's as many as you think works. That being said, if you did two past papers a day (for different subjects), 5 days a week, for two weeks, that's already 20 past papers. You've got way more than two weeks for most of your subjects, so plenty of time to do heaps of papers!
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conic curve

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Re: Mathematics Question Thread
« Reply #392 on: September 19, 2016, 07:38:10 pm »
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Just curious but how do I change my username?

jamonwindeyer

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Re: Mathematics Question Thread
« Reply #393 on: September 19, 2016, 08:08:14 pm »
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Just curious but how do I change my username?

You message a national moderator (like me), but it does need to be a good reason for us to agree to change it for you :)

itswags98

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Re: Mathematics Question Thread
« Reply #394 on: September 21, 2016, 09:41:41 pm »
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How do i attempt this question? Havent done anything like it before. Dumb brain immediately thought of pythag to work out the slope lol
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RuiAce

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Re: Mathematics Question Thread
« Reply #395 on: September 21, 2016, 09:58:18 pm »
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How do i attempt this question? Havent done anything like it before. Dumb brain immediately thought of pythag to work out the slope lol




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« Last Edit: September 21, 2016, 10:01:13 pm by RuiAce »

jakesilove

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Re: Mathematics Question Thread
« Reply #396 on: September 21, 2016, 10:00:50 pm »
+1




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Alternatively (or, rather, using the exact same method but without the actual integration), you can remember that the area under the curve is the change in displacement. Assuming that, prior to t=4, the particle continues to move away from the origin, you can easily find the area under the curve (16) and add that to the original displacement (2). I would have done Rui's way, and they're exactly the same.
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RuiAce

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Re: Mathematics Question Thread
« Reply #397 on: September 21, 2016, 10:01:57 pm »
+1
Alternatively (or, rather, using the exact same method but without the actual integration), you can remember that the area under the curve is the change in displacement. Assuming that, prior to t=4, the particle continues to move away from the origin, you can easily find the area under the curve (16) and add that to the original displacement (2). I would have done Rui's way, and they're exactly the same.
I was going to do it that way, but then I remembered the original displacement was 2 and that's just a bugger. Don't feel safe just adding 2 on for most questions.

It's safer here cause most of the graph is positive. In general though, the absolute extrema might change due to the new ordinates of the stationary points

itswags98

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Re: Mathematics Question Thread
« Reply #398 on: September 21, 2016, 10:18:23 pm »
+1




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I appreciate it. Makes sense and the other way suggested makes sense too. Thanks :3. Hope you wont get sick of me asking questions until HSC time ahah
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lozil

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Re: Mathematics Question Thread
« Reply #399 on: September 25, 2016, 03:26:56 pm »
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Hi, I was just wondering how you find the limit approaching infinity (I get how to do it for the limit approaching an actual number). E.g. Idk just a simple equation like lim x->infinity (x+1)/x

RuiAce

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Re: Mathematics Question Thread
« Reply #400 on: September 25, 2016, 04:04:44 pm »
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Hi, I was just wondering how you find the limit approaching infinity (I get how to do it for the limit approaching an actual number). E.g. Idk just a simple equation like lim x->infinity (x+1)/x



lozil

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Re: Mathematics Question Thread
« Reply #401 on: September 25, 2016, 04:27:29 pm »
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olivercutbill

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Re: Mathematics Question Thread
« Reply #402 on: September 27, 2016, 12:32:36 pm »
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How is this done?
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RuiAce

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Re: Mathematics Question Thread
« Reply #403 on: September 27, 2016, 12:40:44 pm »
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lha

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Re: Mathematics Question Thread
« Reply #404 on: September 27, 2016, 02:21:49 pm »
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Like Jamon says, it's as many as you think works. That being said, if you did two past papers a day (for different subjects), 5 days a week, for two weeks, that's already 20 past papers. You've got way more than two weeks for most of your subjects, so plenty of time to do heaps of papers!

Okay thank you!

Can anyone help me with question 9c)iii) in the 2010 CSSA HSC Trial paper? Its not letting me attach a picture but the paper should be online.

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And it shouldn't be, because CSSA papers are copyrighted. If you find a copy online (which may happen), it was illegally uploaded.
« Last Edit: September 27, 2016, 02:37:05 pm by RuiAce »