HSC 2012 MX2 Marathon (archive) (4 Viewers)

[math man]

Re: 2012 HSC MX2 Marathon

you're not the only one, it does that for all, however, how do robots gain weight by means of human food?
I thought eating metal would make you gain weight

 

[SpiralFlex]

Re: 2012 HSC MX2 Marathon

I eat nuts and bolts and humans.

I better go study or clown will eat me, I will revisit the conics question I posted up, I think it's incorrect.

Post more questions, when I get back tomorrow I shall be having fun on BOS...

 

[math man]

Re: 2012 HSC MX2 Marathon

I eat nuts and bolts and humans.

I better go study or clown will eat me, I will revisit the conics question I posted up, I think it's incorrect.

Post more questions, when I get back tomorrow I shall be having fun on BOS...

your conics question is not entirely wrong, the m<0 condition restricts point of contact to quad1 only, so if you lift that conditon the question is fine

 

[IamBread]

Re: 2012 HSC MX2 Marathon

I don't want to spoil the party but...

Any chance we could have questions more orientated towards a regular MX2 student, or a little harder, but something that most should at least be able to attempt. A lot of people would probably be scared off, especially since you guys are into or out of uni maths already!

Yeah that's probably a good idea. This one is for people who are doing their HSC, and not done it already,

 

[zeebobDD]

Re: 2012 HSC MX2 Marathon

is it bad that i consume maccas atleast 3-4times a week, ontop of other junk food everyday?:S

 

[SpiralFlex]

Re: 2012 HSC MX2 Marathon

is it bad that i consume maccas atleast 3-4times a week, ontop of other junk food everyday?:S

I eat Maccas, 8 times a week...So yes.

 

[lolcakes52]

Re: 2012 HSC MX2 Marathon

Are you sure this is right, it looks like RHS should be equal to -1*LHS

 

[IamBread]

Re: 2012 HSC MX2 Marathon

Are you sure this is right, it looks like RHS should be equal to -1*LHS

It's right.

 

[lolcakes52]

Re: 2012 HSC MX2 Marathon

Okay, because im feeling like an idiot and getting it consistently wrong apparently.

 

[IamBread]

Re: 2012 HSC MX2 Marathon

How are you doing it?

 

[kingkong123]

Re: 2012 HSC MX2 Marathon

Yeah that's probably a good idea. This one is for people who are doing their HSC, and not done it already,

 

[lolcakes52]

Re: 2012 HSC MX2 Marathon

Okay, I cant use latex so I have to explain it. Basically I let the primitive functions of f(x) and f(a-x) be F(x) and F(a-x) respectively. Then I evaluate them as one would usually and I get F(a)-F(0) and F(0)-F(a).

 

[IamBread]

Re: 2012 HSC MX2 Marathon

Well the way I would do it is the way kingkong123 did, except show LHS = RHS, not RHS = LHS.

 

[lolcakes52]

Re: 2012 HSC MX2 Marathon

But what I cant understand is why both of methods seem valid and yet they are mutually exclusive.

 

[Sidekickk]

Re: 2012 HSC MX2 Marathon

well RHS gives you something to work with, you wouldn't know what to do if you started from LHS.

 

[Rezen]

Re: 2012 HSC MX2 Marathon

lolcakes, the if F(x) is the primitive of f(x) then -F(a-x) is the primitive of f(a-x)

 

[zeebobDD]

Re: 2012 HSC MX2 Marathon

I eat Maccas, 8 times a week...So yes.

dw my sporty attributes will work off the fat

 

[largarithmic]

Re: 2012 HSC MX2 Marathon

You can like, do that integration thing just by considering the geometry of it right; like sending x -> a-x is the same as reflecting the graph about the line x = a/2, so the area under the curve between 0 and a is preserved

 

[Carrotsticks]

Re: 2012 HSC MX2 Marathon

You can like, do that integration thing just by considering the geometry of it right; like sending x -> a-x is the same as reflecting the graph about the line x = a/2, so the area under the curve between 0 and a is preserved

You really like your geometry.

Analysis ftw.

 

[IamBread]

Re: 2012 HSC MX2 Marathon

Never thought of it as geometry, I'm not really a geometry person