Methods (CAS) 2009 exam 2 Suggested Solutions.

[Lighties]

And no, not stating x = 0 is undefined in this case does not imply it is undefined.

So what would it imply if you didn't state that x=0? And are you sure you would lose a mark for not stating it?

Thanks NE. I did draw the graph correctly with open circles when x=0, so maybe the examiners will know what I meant?

[TrueTears]

And no, not stating x = 0 is undefined in this case does not imply it is undefined.

So what would it imply if you didn't state that x=0? And are you sure you would lose a mark for not stating it?

Thanks NE. I did draw the graph correctly with open circles when x=0, so maybe the examiners will know what I meant?

What would it imply? It wouldn't imply anything, it just shows you haven't considered all values of x. If I was an examiner I'd definitely take a mark off. But I don't know how examiners mark Methods exams, so I won't know if you lost a mark or not. But technically it is wrong not to state x = 0 is undefined.

[Ball Lightning]

Oh TrueTears.

If i screwed up the domain for the first extended response question, by making it R+, what would be your guess for how many marks they take off, assuming the graph is correct from what i worked out the question before. 1 or 2?

[TrueTears]

Probs 2.

1 for not having open circle (assuming you didn't)

1 for not having 2 seperate halves.

[Lighties]

And no, not stating x = 0 is undefined in this case does not imply it is undefined.

So what would it imply if you didn't state that x=0? And are you sure you would lose a mark for not stating it?

Thanks NE. I did draw the graph correctly with open circles when x=0, so maybe the examiners will know what I meant?

What would it imply? It wouldn't imply anything, it just shows you haven't considered all values of x. If I was an examiner I'd definitely take a mark off. But I don't know how examiners mark Methods exams, so I won't know if you lost a mark or not. But technically it is wrong not to state x = 0 is undefined.

Alright, thank you.

[Ball Lightning]

Probs 2.

1 for not having open circle (assuming you didn't)

1 for not having 2 seperate halves.

Thanks thought so, just wanted another opinion