'Stupid' Exam Questions

[speedy]

Are you allowed to write (for general solutions), n where n is the set of odd numbers?
Or do you have to do (2n+1) where n is the set of integers?

Edit: Also, for spesh, does it matter where the Weight and Normal force original from? When drawing them in.

[Escobar]

About the units:

Dear xxx,

Thank you for your email enquiry about Mathematical Methods examinations.

The general advice is that units should be included where appropriate. Students should be guided by the question in the examination.

All the best for your exams.

 

VCE Examinations Unit

[jw12]

Are you allowed to write (for general solutions), n where n is the set of odd numbers?
Or do you have to do (2n+1) where n is the set of integers?

Writing 'n ∈ Z' is sufficient I think

[speedy]

Writing 'n ∈ Z' is sufficient I think

But is writing n ∈ odd integers ok too?

Another question: When you have to show something, can you 'cheat'? What I mean by this is, given the solutions, go straight to the factored form from the quadratic. For example, Question 7 on the 2013 Exam, they gave you the two solutions... so can you do this? (3rd last line)

Spoiler

(sorry for scribble)

Also: when hence integrating with a definite integral, would you set the integral up first, then add the bounds after you've got it all cleaned up? Moreover, if you did this, would you have to include the c before you make it a definite integral?

[Camo15]

Also: when hence integrating with a definite integral, would you set the integral up first, then add the bounds after you've got it all cleaned up? Moreover, if you did this, would you have to include the c before you make it a definite integral?

I believe you do need to write +c if you've got the already integrated portion as an indefinite integral, then it can disappear when you have the definite one.

[Blondie21]

Another question: When you have to show something, can you 'cheat'? What I mean by this is, given the solutions, go straight to the factored form from the quadratic. For example, Question 7 on the 2013 Exam, they gave you the two solutions... so can you do this? (3rd last line)

Spoiler

(sorry for scribble)

Also: when hence integrating with a definite integral, would you set the integral up first, then add the bounds after you've got it all cleaned up? Moreover, if you did this, would you have to include the c before you make it a definite integral?

my friend did this and scored full marks (exact same q)

[jw12]

But is writing n ∈ odd integers ok too?
 

But Z stands for negative and positive integers, but whatever you write should be fine as well

[Blondie21]

if there is an open circle and a closed circle on top of one another, which do we draw?

lmao

the closed circle yeah??

[speedy]

But Z stands for negative and positive integers, but whatever you write should be fine as well

Yeah I know, but for example, cos(x) = 0.
The general solution is not n(pi/2) where n ∈ Z

-> it is n(pi/2) where n ∈ odd numbers [OR (2n+1)(pi/2) where n ∈ Z]

I'm just wondering if the former is fine

my friend did this and scored full marks (exact same q)

Lol, thanks

[AngelWings]

My teacher said that you weren't allowed to do that

It's practically the same as marking the multiple choice sheet with your saliva or fingernail. It's a 'no-no'.

About the units:

Dear xxx,

Thank you for your email enquiry about Mathematical Methods examinations.

The general advice is that units should be included where appropriate. Students should be guided by the question in the examination.

All the best for your exams.

 
VCE Examinations Unit

At least that's settled now.

[keltingmeith]

Thanks to everyone for getting onto this in my absence! Unfortunately, I haven't updated the first post - I hope to get that fixed sometime tomorrow.

Edit: Also, for spesh, does it matter where the Weight and Normal force original from? When drawing them in.

They should start from the centre of the mass (assuming that's what you're talking about)

Yeah I know, but for example, cos(x) = 0.
The general solution is not n(pi/2) where n ∈ Z

-> it is n(pi/2) where n ∈ odd numbers [OR (2n+1)(pi/2) where n ∈ Z]

I'm just wondering if the former is fine

Lol, thanks

I wouldn't go with the former - the odd numbers can be defined as a set by 2n+1, where , which is why you write the 2n+1. I've honestly never seen saying "n is an odd number", so I don't know if there's anything wrong with it, but would assume that 2n+1 is just more correct.

if there is an open circle and a closed circle on top of one another, which do we draw?

lmao

the closed circle yeah??

Yep, the closed circle - open would imply the point doesn't exist.

Also: when hence integrating with a definite integral, would you set the integral up first, then add the bounds after you've got it all cleaned up? Moreover, if you did this, would you have to include the c before you make it a definite integral?

Personally, I just don't see how this would be quicker. You know of the notation, yeah?

[speedy]

Personally, I just don't see how this would be quicker. You know of the notation, yeah?

Ok, well this is my working:

Spoiler

lines 3 and 4. It just seems neater to me than any other way, I like keeping them in the same brackets aha.

Edit: just realised I missed a dx near the top, don't kill me aha. Edit: Fixed it, couldn't help myself

[keltingmeith]

Ok, well this is my working:

Spoiler

lines 3 and 4. It just seems neater to me than any other way, I like keeping them in the same brackets aha.

Edit: just realised I missed a dx near the top, don't kill me aha. Edit: Fixed it, couldn't help myself

Ah yep, I getcha. That's fine - other ways to do it, but I won't stress you out with new notation. Also, I don't see where you're missing the dx...

[chocolatechipcookies]

dumb question but especially in extended response of exam 2 where they usually have a trig equation and they get you to solve the value for the unknown, do you use the general solution formula or the 'other way' to do it?

I find the general formula easier to do in the applications, except that it's hard to 'show working' for it.

-----------------------

and another question, do we really need to know the double angle and addition formulas?
can barely remember them, and I've never come across it in a practice exam???

[keltingmeith]

dumb question but especially in extended response of exam 2 where they usually have a trig equation and they get you to solve the value for the unknown, do you use the general solution formula or the 'other way' to do it?

I find the general formula easier to do in the applications, except that it's hard to 'show working' for it.

-----------------------

and another question, do we really need to know the double angle and addition formulas?
can barely remember them, and I've never come across it in a practice exam???

First: if you wrote out the general formula in full, then simplified, I think you'd be fine.

Second: Look, it's in the study design, but I really do not see how methods could use them... Even for spec, they're on the formula sheet, I don't know why methods kids are expected to memorise them, particularly for the ones doing both. Just chuck 'em in your notes book and refer to that if you need to.