'Stupid' Exam Questions

[speedy]

Alright speedy, your explanation is coming! I'll probably have time tomorrow to write it all out full and proper and such.

Thankyou

Any thoughts on the matrix stuff though?

[abeybaby]

Summary:

f is increasing over [m,n] if for all a,b inside [m,n], a>b implies that f(a)≥f(b).

f is strictly increasing over [m,n] if for all a,b inside [m,n], a>b implies that f(a)>f(b).

[keltingmeith]

Actually, just found this super cool video on it that should clear things up (also why we need two definitions):
https://www.youtube.com/watch?v=1mW6pOq7CsI

Did find a website that said strictly increasing doesn't include stationery points (it was a normally reliable website, too...) - this is wrong. That video is right, though.

[speedy]

Actually, just found this super cool video on it that should clear things up (also why we need two definitions):
https://www.youtube.com/watch?v=1mW6pOq7CsI

Did find a website that said strictly increasing doesn't include stationery points (it was a normally reliable website, too...) - this is wrong. That video is right, though.

Thanks! That was really simple and helpful

[Escobar]

In a transition matrix question,
if you have already written out the matrix itself for the working of another part of the question (or if the matrix is already shown in the question), do we need to write out the whole matrix again in our working? or just write [T]

[Yacoubb]

In a transition matrix question,
if you have already written out the matrix itself for the working of another part of the question (or if the matrix is already shown in the question), do we need to write out the whole matrix again in our working? or just write [T]

As long as you define the transition matrix as T, you can use T.

[bobisnotmyname]

hey I don't know if this is common knowledge or what, but on my TI-nspire cas (grey and white one) when graphing how do you get more decimal places on points, mine is only to two decimal places
Thanks alot

[abeybaby]

hey I don't know if this is common knowledge or what, but on my TI-nspire cas (grey and white one) when graphing how do you get more decimal places on points, mine is only to two decimal places
Thanks alot

Settings>graphs and geometry>Display digits>Float "however many decimal points you want"

[bobisnotmyname]

Settings>graphs and geometry>Display digits>Float "however many decimal points you want"

thanks heaps,
silly me I was looking in the wrong spot, I put it on fix 4, at the most they ask for 4 decimal places and hopefully my screen wont get to cluttered.

[speedy]

When 'hence' integrating, can we wait until the end to add the "c"?

OR, do we have to have like C1, C2 and carry them down until we eventually let C3 = C1 +(or -) C2?

[keltingmeith]

When 'hence' integrating, can we wait until the end to add the "c"?

OR, do we have to have like C1, C2 and carry them down until we eventually let C3 = C1 +(or -) C2?

You must add the "+c" the moment you lose an integration sign. Like so:

I don't need to change the constant - because the value of this constant is completely arbitrary, and not doing those operations on it will still cause us to find the right value for it anyway once we have the initial conditions. Another thing you can do is dissolve any constants into the constant of integration, c. So, I can also turn the above equation into:

[skeletalclown]

Okay, I'm not 100% if this is the best place to post this, but I don't really want to start a new thread for just one question.
I'm having a lot of trouble understanding the 2013 Exam 2 Question 1fi and 1fii and would really really appreciate a quick explanation!!

[paper-back]

Will VCAA put in questions that are based on physics concepts?
E.g. things like integrating a velocity graph gives displacement

[skeletalclown]

I've done all the exams back to 2006 and don't remember having ever seen it.

[keltingmeith]

Okay, I'm not 100% if this is the best place to post this, but I don't really want to start a new thread for just one question.
I'm having a lot of trouble understanding the 2013 Exam 2 Question 1fi and 1fii and would really really appreciate a quick explanation!!

This is a thread for general questions - I suggest you take this to the Methods 3/4 Question Thread linked in the first post.

Will VCAA put in questions that are based on physics concepts?
E.g. things like integrating a velocity graph gives displacement

They can ask you things like this, BUT they'd have to explain it instead of just saying "find the displacement of this particle".

Note that the methods curriculum does actually cover some straight-line kinematics, from the study design:

application of integration to problems involving calculation of the area of a region under a curve
and simple cases of areas between curves, such as distance travelled in a straight line; average
value of a function; other situations modelled by the use of the definite integral as a limiting value
of a sum over an interval; and finding a function from a known rate of change.