ATAR Notes: Forum

VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Specialist Mathematics => Topic started by: dopplereffect on October 18, 2011, 08:10:56 pm

Title: Rationalising
Post by: dopplereffect on October 18, 2011, 08:10:56 pm

The VCAA assessor's reports don't, then should we?

Title: Re: Rationalising
Post by: b^3 on October 18, 2011, 08:13:11 pm

They don't but they usually say that other equivalent answers are acceptable. I would rationalise it just in case they want to be strict (like chem mid-year) and take marks off for anything. That way you haven't done anything wrong, and they are bound to one day say that rationalising is nessecary. In the end its up to you, but if you want to be safe, then rationalise it.

Title: Re: Rationalising
Post by: Natters on October 20, 2011, 12:32:18 pm

yeah it takes like 10 seconds, can't hurt

Title: Re: Rationalising
Post by: dopplereffect on October 20, 2011, 05:40:22 pm

I do it all the time not it's not an issue for me, but the spesh assessors sound laid back, like on pot.

Title: Re: Rationalising
Post by: Natters on October 20, 2011, 05:46:15 pm

on the subject will they care if i use y' instead of dy/dx
i got myself into the habit whilst doing the implicit differentiation stuff and now i can't help it lol

Title: Re: Rationalising
Post by: dc302 on November 01, 2011, 06:17:32 pm

Quote from: Natters on October 20, 2011, 05:46:15 pm

on the subject will they care if i use y' instead of dy/dx
i got myself into the habit whilst doing the implicit differentiation stuff and now i can't help it lol

I would say only if the situation is ambiguous. For example, if you have given you dy/dt and are asking you to find dy/dx, then y' becomes ambiguous since it doesn't tell you which variable you are differentiating with respect to. So to be safe, I would use dy/dx, dy/dt etc.