Regarding 2012 HSC Q15b
I know how to do the whole question.
My question is - what does part (iii) have to do with the remainder of the question?
I don't think I've seen an HSC question before where a part does not link in some way to a later part.
But here, the 'real zero' restriction in part (iii) does not apply to the last three parts. (You could make parts (iv) and (v) very trivial using that restriction, but part (vi) is then unprovable.)
What is part (iii) doing there? Surely the HSC examiners weren't just looking for a 2 mark filler.
I know how to do the whole question.
My question is - what does part (iii) have to do with the remainder of the question?
I don't think I've seen an HSC question before where a part does not link in some way to a later part.
But here, the 'real zero' restriction in part (iii) does not apply to the last three parts. (You could make parts (iv) and (v) very trivial using that restriction, but part (vi) is then unprovable.)
What is part (iii) doing there? Surely the HSC examiners weren't just looking for a 2 mark filler.