HSC Stuff > HSC Mathematics Extension 1

Help with Derivatives

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Dragomistress:
May I have a sample of BOSTES answer to one of these questions. I can't seem to find one. Probably because I don't understand what I am doing :P

jamonwindeyer:

--- Quote from: JKFlacka on February 11, 2017, 02:04:01 pm ---May I have a sample of BOSTES answer to one of these questions. I can't seem to find one. Probably because I don't understand what I am doing :P

--- End quote ---

It doesn't pop up much in the HSC these days, here is a sample from Question 7(a)(i) 2009 (that is the Extension Paper) ;D I can't find any more on a quick search, it used to be more common, if you go to the NESA (new BOSTES) website and go through sample solutions from 2U exams (early 2000's late 90's) I think you'll find more there :)

But as an indicator, the working I gave for one of the questions above is roughly what you are aiming for :)

Dragomistress:
Okay. Cool.

Thanks a ton. I understand this concept now. 100 ATAR here I come :P

jamonwindeyer:

--- Quote from: JKFlacka on February 11, 2017, 02:58:09 pm ---Okay. Cool.

Thanks a ton. I understand this concept now. 100 ATAR here I come :P

--- End quote ---

No worries! Glad to hear it - This gave me a fair bit of trouble when I first learned it :)

Dragomistress:
Oh wow... I'm stuck again :/

According to the textbook:
If f(x)=g(x)+h(x), then
f'(x)=g'(x)+h'(x)

Question
Differentiate: f(x)=4x^2-3x+2

Why is this wrong?
f'(x)= 4(2x)-3(x^0)+2
f'(x)=8x-3+2
f'(x)=8x-1

But the actual answer is 8x-3. Does the two get ignored or something?

Also, how do I make that beautiful looking type font for math?

:D

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