VCE Methods Question Thread!

[lzxnl]

When finding the values for x in which f(x) is strictly/decreasing, why do we have to include the turning point (according to insight exam 2014 solutions)? Isn't the gradient 0 there, so not decreasing or increasing?

Another reason why you don't use the gradient:
'Strictly increasing/decreasing' applies also when the function is discontinuous or otherwise not differentiable.

[knightrider]

For this question attached.

Can you please check if my  initial state matrix and the transition matrix are right?



AND

[knightrider]

For this image attached.

Is the reason they got rid of the (x+1)'s because they took it out as a common factor?

[keltingmeith]

For this question attached.

Can you please check if my  initial state matrix and the transition matrix are right?



AND

This is beyond the scope of methods - I would not be using this as a practice question.

[knightrider]

This is beyond the scope of methods - I would not be using this as a practice question.

Is it right though?

[knightrider]

For this image attached.

Is the reason they got rid of the (x+1)'s because they took it out as a common factor?

Can anyone help with this ?

[Rishi97]

Can anyone help with this ?

Yes
To simplify an equation further, common factors are take out

[odeaa]

For where p is a positive constant and , what values of , correct to 4 decimal places, does the maximum value of occur when ?

[qwerty101]

Yes
To simplify an equation further, common factors are take out

beat me to it

[knightrider]

For this question attached.

Can you please check if my  initial state matrix and the transition matrix are right?



AND

could someone check if my answer is right?
Thanks 

[Adiamond]

*Disclaimer, you cut out the last part of the question so i had to guess if he went from low to high with a 5% rate or low to medium with a 5% rate, i chose low->high with a 5% rate because it seems to be the most logical.

You were close but not quite right, first of all I would put it all in order, it makes it much easier, I do it from the top to the side (so if the top order is High-Med-Low, the side order will be high-Med-Low).

The second change would be a quality of life change, it won't be a game changer but it will be the difference between getting 3/4 marks or full marking a question.
Because the question specifies that this is out of 200 people, you should convert those percentages to people in your initial state matrix.

Good luck and happy hunting for the rest of the year!

[knightrider]

*Disclaimer, you cut out the last part of the question so i had to guess if he went from low to high with a 5% rate or low to medium with a 5% rate, i chose low->high with a 5% rate because it seems to be the most logical.

You were close but not quite right, first of all I would put it all in order, it makes it much easier, I do it from the top to the side (so if the top order is High-Med-Low, the side order will be high-Med-Low).

The second change would be a quality of life change, it won't be a game changer but it will be the difference between getting 3/4 marks or full marking a question.
Because the question specifies that this is out of 200 people, you should convert those percentages to people in your initial state matrix.

Good luck and happy hunting for the rest of the year!

Thanks Adiamond 

but i did my order as high,low and then medium 

[Adiamond]

Thanks Adiamond 

but i did my order as high,low and then medium 

Hahaha i didn't even think of that, sorry mate your transition matrix was right then.

[cosine]

May someone show me how to logically tackle this question, without the abuse of the assessors report, in other words, can someone show me why and how they get the answer? Please?

[lzxnl]

The largest domain that cos u is one to one is something like [0, pi]. You therefore want log_a(x) to only take these values. Try the rest yourself now,