2015 csaa mathenatics paper (3 Viewers)

[Drsoccerball]

For the probability one on the last page I did 0.95=(74/75)^n and got the wrong answer but can I still get a mark even though I didn't do the 1-? And sorry for not using latex I need to learn.

Doubt you'd get the mark tbh

 

[maddie2713]

did anyone else find the exam super hard?

 

[lastofus]

I found it pretty hard but then again, maths has never been my thing.

 

[astroman]

that was fuking hard af, i'll be surprised with 50%

 

[SlimiJay]

not really i found it reasonable however overtime im slowly realising i did some really stupid stuff

 

[stephbranelz]

Hardest thing I've ever done hahaha

 

[lastofus]

I feel the same way... and my school already put the results up for multiple choice wtf . I feel lucky to have back up subjects in case I screw this up... hopefully i don't screw them up too or R.I.P ATAR

 

[john1464]

I found it moderately hard made a few sillies but I definitely found it harder than the previous catholic trials.

 

[lastofus]

I found it moderately hard made a few sillies but I definitely found it harder than the previous catholic trials.

Agreed

 

[User name]

could someone post solutions for the very last question? i got X=-1999.42 or something and y as 0.035 or something like that
the question was find the y value of the minimum turning point at (X+1999)(X+2000)(X+2001) using the fact that (X-1)X(X+1) = X^3 - X

 

[FightingSmile64]

I personally aiming for around 70. It wasnt a hard test rather challening. The last questions got me. Most of the 3unit kids in my school all had different answers around q15 and q16 it was funny. Personally i hope it can push me to 5-6 rank out of 12.

 

[Drsoccerball]

a)
b)




continue...

Do this

 

[john1464]

could someone post solutions for the very last question? i got X=-1999.42 or something and y as 0.035 or something like that
the question was find the y value of the minimum turning point at (X+1999)(X+2000)(X+2001) using the fact that (X-1)X(X+1) = X^3 - X

I got something very similar to your minimum value however, my y was -0.385.

 

[HolyCow]

You serious...I wrote 233 fml ;/ It was like 0.0956... when I subbed it back in

 

[tonysoprano]

16. a) Was it moving right or left?

And made so many silly mistakes as I'm realising. Give me a 70% Jesus Christ, and I'll become a practicing Catholic.

 

[tonysoprano]

Oh, and I can't remember the question number, but it was about that circle dunked into the water. What was ii) ? It asked for the area of the circle un-dunked. Does anyone remember what they got?

 

[drainbammage]

Oh, and I can't remember the question number, but it was about that circle dunked into the water. What was ii) ? It asked for the area of the circle un-dunked. Does anyone remember what they got?

It was the undunked part, so it was the area of the circle minus the area of the minor segment. I got something in the 500s.

 

[tonysoprano]

It was the undunked part, so it was the area of the circle minus the area of the minor segment. I got something in the 500s.

Oooo yay so did I. Praying I did it right, coz i chucked a yolo. I couldn't do part i though

 

[jazz519]

Hey, for 16a I put it was moving towards the origin, so left because the gradient at t=3 was negative if you subbed into equation.

 

[drainbammage]

Oooo yay so did I. Praying I did it right, coz i chucked a yolo. I couldn't do part i though

Yeah neither did i, i just put the formula down and put some bs, hopefully i get a mark for subbing