Mathematics Extension 1 Exam Predictions/Thoughts (1 Viewer)

[tywebb]

Terry Lee’s solutions:

http://advancedmathematics.com.au/Resources/2019%20Ext1.pdf

 

[jerry.huang999999]

Wait what. I got 15 for binomials ... must’ve messed up something! Faaaaaa

i actually
get k=14 bc k=15 is for k+1, i just checked by demos where is coefficient of x^k+1 and x^k ,since k is 15 and another one is 14 , k should be 14 to satisfy the coefficient.

 

[jerry.huang999999]

i got iirc

shouldnt it be /5????

 

[mkennedy84]

I think that q10 is only 1 meeting point or A , terry lee is suggesting B

 

[marcyboiiiiiiiii]

anyone else accidentally get an inverse tan integral for the u=(cosx)^2 by subbing u^2 lol

Yep lol. Do you think we can still get 3 cuz we technically made it more difficult haha

 

[mkennedy84]

 

[flowerp]

I think that q10 is only 1 meeting point or A , terry lee is suggesting B

I also got B, cuz I thought that there were 2 branches, right????

 

[HeroWise]

How many of u got Last question of 14

 

[mkennedy84]

I also got B, cuz I thought that there were 2 branches, right????

The graph i have above, in red is y=-sqrt1+sqrt(1+x)the green is y=x and the blue one is y=x^4-2x^2. Regardless of whether there are two branches in the graph given, the original function only exists if x>-1, and in order for the inverse graph to show symmetry about y=x, the x<-1 is the inverse part function

 

[flowerp]

The graph i have above, in red is y=-sqrt1+sqrt(1+x)the green is y=x and the blue one is y=x^4-2x^2. Regardless of whether there are two branches in the graph given, the original function only exists if x>-1, and in order for the inverse graph to show symmetry about y=x, the x<-1 is the inverse part function

I see, my bad .... thank you for the clarification!

 

[Arrowshaft]

Yeah how much is would they penalise for getting an inverse tan fun function for the integral instead?

 

[Idkwhattoput]

View attachment 27447

I made one silly mistake in the entire exam after checking every single question rigorously, but this is the only one that somehow slipped my mind. For some reason I didn't consider the equation of the function and just assumed the blue graph was the inverse (which I realise is wrong for many reasons). Of all the things I could've lost a mark to, it had to be multiple choice.

 

[psmao]

i got iirc

shouldnt it be /5????

yeah it’s 5 I made a typo

 

[psmao]

I made one silly mistake in the entire exam after checking every single question rigorously, but this is the only one that somehow slipped my mind. For some reason I didn't consider the equation of the function and just assumed the blue graph was the inverse (which I realise is wrong for many reasons). Of all the things I could've lost a mark to, it had to be multiple choice.

I legit got the same mistake and this is the only mistake I made lol. I had the same feeling and checked everything except “forms part of “

 

[akkjen]

yeah it’s 5 I made a typo

do I lose marks for not having exact value but instead decimal value of this, it didnt ask for exact value

 

[Idkwhattoput]

I legit got the same mistake and this is the only mistake I made lol. I had the same feeling and checked everything except “forms part of “

What are the chances of a 69 aligning to 100? I mean I know the 100 definitely won't be a state rank, but I know that once a 99 aligned to 100 (seen in raw marks database)

 

[Idkwhattoput]

do I lose marks for not having exact value but instead decimal value of this, it didnt ask for exact value

I think for 'applications to the real world', decimal values are fine. But this is my opinion not knowledge of how HSC markers think

 

[Arrowshaft]

I legit feel like killing myself right now, I completely screwed myself over with my silly mistakes. I got 99 in trials and was confident in 3U but only ended up getting 3 hours sleep today because of anxiety, and I now I screwed over the exam with way more silly mistakes than I would’ve though. I’m really sad because 3U was the test I thought I’d smash. Stuff my life man, I feel too depressed

 

[psmao]

Terry Lee’s solutions:

http://advancedmathematics.com.au/Resources/2019%20Ext1.pdf

terry lee got the temperature question wrong hahahah
He didn’t find dT/dt lol

 

[psmao]

I legit feel like killing myself right now, I completely screwed myself over with my silly mistakes. I got 99 in trials and was confident in 3U but only ended up getting 3 hours sleep today because of anxiety, and I now I screwed over the exam with way more silly mistakes than I would’ve though. I’m really sad because 3U was the test I thought I’d smash. Stuff my life man, I feel too depressed

I played leagues the night before exams and the feeling of angry because of trash team totally made me forget the anxiety of the exams LoL