I called the HSC advice line today. (1 Viewer)

[ND]

Turns out you are allowed to assume the symmetry rules for integration.

 

[Newbie]

whats the symmetry rule for integration?

 

[ND]

I -a-->a f(x)dx where f(x) is odd = 0, where f(x) is even = 2I 0-->a f(x)dx.

 

[Newbie]

thanks

i mean......err......of course i knew that.......

 

[underthesun]

If you weren't allowed, how are you supposed to prove it?

 

[turtle_2468]

You would split it up into integrating from -a to 0 and 0 to a, do a change of variable (u=-x) for the first one to change the limits of integration into (0 to a), then cancel out.

 

[underthesun]

whoa.. so this certainly saves your time then

 

[Dash]

Isn't that method part of the syllabus anyway?

Why did you have to confirm it?

 

[ND]

Well maths is the only subject i don't go through the syllabus for.

 

[freaking_out]

hey, ND, did u ask about if u can assume that definit integral of

f(x)=f(a-x)?

 

[ND]

Originally posted by freaking_out
hey, ND, did u ask about if u can assume that definit integral of

f(x)=f(a-x)?

I asked that today, you're not allowed. I also asked about whether you're allowed to assume the nth roots of unity are 1, z, z^2 etc. and you are allowed to do that.

 

[freaking_out]

Originally posted by ND
...I also asked about whether you're allowed to assume the nth roots of unity are 1, z, z^2 etc. and you are allowed to do that.

what do u mean by that?? anyway when u do use it,the question bfore should u to show that wouldn't it?(eg. find all the roots etc.)....

 

[ND]

Originally posted by freaking_out
what do u mean by that?? anyway when u do use it,the question bfore should u to show that wouldn't it?(eg. find all the roots etc.)....

No not always.

 

[mercury]

hmm, I got rawted a mark in my trial then. But proving it is ok too, js saves a lotta trouble just quoting it =p

 

[nerdd]

Originally posted by ND
Well maths is the only subject i don't go through the syllabus for.

you guys actually look in the syllabus for maths?!..............

 

[McLake]

Originally posted by nerdd
you guys actually look in the syllabus for maths?!..............

I did. It tells you where the (loose) limits are ...

 

[ricenoodles]

what are the (loose) limits?

 

[McLake]

Originally posted by ricenoodles
what are the (loose) limits?

Can't remember now, but limits on the kinds of quetions they can ask (ie: what kind of shapes for volumes)

 

[Excalibur]

hey ND you mentioned in another thread that you had done a few full papers. Yet didn't give your mark so i was wondering what mark did you get, even thought you'd seen the Q's B4 coz lets face it we're gunna have seen most of the Q's B4 in the real thing too!