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July 17, 2025, 10:21:44 pm
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Author Topic: Methods Examination 2 Discussion  (Read 36844 times)  Share 

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achre

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Re: Methods Examination 2 Discussion
« Reply #30 on: November 07, 2013, 05:49:33 pm »
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I'm 100% sure the last question required that x/a y/b = 1 or something formula for when you know an intercept, but I didn't have it in my bound reference.
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Twanny666

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Re: Methods Examination 2 Discussion
« Reply #31 on: November 07, 2013, 05:49:56 pm »
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Really tough exam,
Managed to do the last questions However I skipped the Transformation Q' P' or whatever, I has no idea what it was asking.
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ahat

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Re: Methods Examination 2 Discussion
« Reply #32 on: November 07, 2013, 05:50:14 pm »
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Quote from: b_blah on November 07, 2013, 05:48:01 pm
This wasn't even the last question lol it was to find velocity of the train.  I didn't even attempt the last question.  Oh well. 50/80 hopefully.

Also that transformation question wtf? How can you multiply the image of two points to get a number? Just super confused :(

MY GOSH I KNOW! It was extremely badly worded X'P' meant the line segment not the product. They should have written, "the line segment X'P' = ..."
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mystikal

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Re: Methods Examination 2 Discussion
« Reply #33 on: November 07, 2013, 05:50:23 pm »
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well, as long as you guys made up an answer for the first part of  the last question afterwards, but showed working even if using an incorrent number you would still get consequential marks for method for the remaining of the paper.
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DylanFitzmaurice

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Re: Methods Examination 2 Discussion
« Reply #34 on: November 07, 2013, 05:51:12 pm »
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What do you guys think of this Methods of Finding the minimum value of X for point Q to be closest the origin;

(16-x^2/ all over 4)^2 + X^2 = Distance squared
Square root the above

Derive it to find Minimum value
Solve for zero for the domain (0<X<2)?
Then you get the X value?
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lolipopper

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Re: Methods Examination 2 Discussion
« Reply #35 on: November 07, 2013, 05:51:56 pm »
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Tasmania Jones = my arch enemy
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saedf

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Re: Methods Examination 2 Discussion
« Reply #36 on: November 07, 2013, 05:54:24 pm »
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Gradient for last Q = -root(k-4)?
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DylanFitzmaurice

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Re: Methods Examination 2 Discussion
« Reply #37 on: November 07, 2013, 05:54:34 pm »
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Quote from: ahat on November 07, 2013, 05:50:14 pm
MY GOSH I KNOW! It was extremely badly worded X'P' meant the line segment not the product. They should have written, "the line segment X'P' = ..."

Yeah I had no idea WTF they were asking, so horridly worded, Hopefully they just give everyone the Marks XD
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achre

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Re: Methods Examination 2 Discussion
« Reply #38 on: November 07, 2013, 05:56:15 pm »
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Quote from: DylanFitzmaurice on November 07, 2013, 05:51:12 pm
What do you guys think of this Methods of Finding the minimum value of X for point Q to be closest the origin;

(16-x^2/ all over 4)^2 + X^2 = Distance squared
Square root the above

Derive it to find Minimum value
Solve for zero for the domain (0<X<2)?
Then you get the X value?
Dont have a CAS handy but if you got 2root2 you got the same as me at least.
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DylanFitzmaurice

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Re: Methods Examination 2 Discussion
« Reply #39 on: November 07, 2013, 05:57:18 pm »
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Quote from: achre on November 07, 2013, 05:56:15 pm
Dont have a CAS handy but if you got 2root2 you got the same as me at least.


Yeah Its 2 Root 2... funny thing is, I didn't do it in the exam -_- was more of a hindsight thing
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Checkmate

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Re: Methods Examination 2 Discussion
« Reply #40 on: November 07, 2013, 05:59:50 pm »
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Tasmania Jones' velocity equation got me, the oh there's this support beam thing in the middle of the curve where it's a max, the last 8 marks, transformation with X'P'Q', and some other crap.

Damn it.
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Solidarity

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Re: Methods Examination 2 Discussion
« Reply #41 on: November 07, 2013, 06:00:25 pm »
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omg tassie jones, why!?!
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casbanjo

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Re: Methods Examination 2 Discussion
« Reply #42 on: November 07, 2013, 06:02:34 pm »
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Thank god, so much easier than yesterday!
Only thing I'm not sure about is last question, can someone run through it?
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simba

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Re: Methods Examination 2 Discussion
« Reply #43 on: November 07, 2013, 06:03:39 pm »
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For the weird x-y dilation question I just ended up using similar triangles because I was so desperate :p
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Checkmate

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Re: Methods Examination 2 Discussion
« Reply #44 on: November 07, 2013, 06:04:53 pm »
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Quote from: simba on November 07, 2013, 06:03:39 pm
For the weird x-y dilation question I just ended up using similar triangles because I was so desperate :p
I think I just applied matrices and it worked? What was the trouble with that one?
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