Maths Ext 2 Predictions/Thoughts (1 Viewer)

[tito981]

With this graph of , I wonder how many sketches noted that there should be an open circle at the origin and a closed circle at .

isnt z=-pi out of the principle argument domain

 

[Jojofelyx]

ive lost like 12 marks definite, probs aiming for like 85ish. I hope scaling is like 2013.

You reckon new syllabus ever going to compare to old syllabus, particularly 2013 aligning?? Surely not

 

[CM_Tutor]

isnt z=-pi out of the principle argument domain

You are correct, so that means there should be open circles at and at and the boundary along the real axis between them should be dotted.

Good catch!

 

[notme123]

You are correct, so that means there should be open circles at and at and the boundary along the real axis between them should be dotted.

Good catch!

i suddenly have a newfound appreciation for the last question because there are so many intricacies. maybe i should've used my brain instead of just doing 2 graph inequality

kinda upset i didnt do it right because it seems so simple and logical looking back. probs gettin 1/3

 

[akhan324]

This was harder than Ruse/NSB ?? Ya'll sure about that?

yea did you do their 2021 papers or not? you would clearly see it’s much harder and very different

 

[Life'sHard]

I was also pretty sad there weren’t any integration questions

 

[Jojofelyx]

yea did you do their 2021 papers or not? you would clearly see it’s much harder and very different

Different sure, idk about harder, as a couple people have said, there were a lot more 'easy' marks out to get, really dont think that was so much the case for the NSB 2021 paper, might just be personal strengths thing

 

[tito981]

i suddenly have a newfound appreciation for the last question because there are so many intricacies. maybe i should've used my brain instead of just doing 2 graph inequality

kinda upset i didnt do it right because it seems so simple and logical looking back

yeah i feel with new syllabus they wont include as much conventional locus questions and it may be more need to be thought of more intuitively rather than algebraically.

 

[notme123]

yeah i feel with new syllabus they wont include as much conventional locus questions and it may be more need to be thought of more intuitively rather than algebraically.

ye reckon you can get 1 mark getting y=xtanx as a boundary and sketching it properly. but the shading part you really need to know your stuff.

 

[AlphaBetaThetaGamma]

yeah i feel with new syllabus they wont include as much conventional locus questions and it may be more need to be thought of more intuitively rather than algebraically.

16a was easy it was just cauchy schwartz inequality but then again im not a high school student.

 

[notme123]

for the projectile question just now i ended up with the result ??????. i used the exact same method i did in the test only now im calmer and more careful with my algebra but somethings not right obv. does anyone have a solution



dividing everything by t and simplifying:

 

[Trebla]

for the projectile question just now i ended up with the result ??????. i used the exact same method i did in the test only now im calmer and more careful with my algebra but somethings not right obv. does anyone have a solution

Maybe show your working?

 

[notme123]

Maybe show your working?

sorry i was taking a while on Latex

 

[Trebla]

Well for starters it can’t be right as that is beyond the range for a sine function. The errors seems to be where you squared the constant term in your discriminant...

 

[notme123]

Well for starters it can’t be right as that is beyond the range for a sine function. The errors seems to be where you squared the constant term in your discriminant...

omg im an idiot thank you hahaha

 

[notme123]

new solution



dividing everything by t and simplifying:






or

is this correct or are there specific values for theta in this range

 

[tito981]

new solution



dividing everything by t and simplifying:







is this correct or are there specific values for theta in this range

that should be right

 

[notme123]

that should be right

if it is im mad rn because i did this exact same thing in the exam i just messed up the expanding and simplification cuz of algebraic mistakes. how many marks would i get?

also how does one explain the justification part

 

[Trebla]

For completeness you should ideally also justify that the two points are on the projectile itself (i.e. not on the part of the parabolic equation where y < 0)

 

[Paradoxica]

look at the sum and product of roots of the quadratic to show that they are both positive