Mathematics Extension 1 Exam Predictions/Thoughts (4 Viewers)

[Arrowshaft]

Complementary angles

Lol what, it asked for alpha as a root between x1 and x2

 

[AHafza]

Binomial coefficients are symmetrical...

Yh so 5 and 15 is right

 

[Arrowshaft]

Yh so 5 and 15 is right

But the expression wasn’t a binomial coefficient, it also included powers of 2 and x

 

[Chamoun]

Can someone post the full paper

 

[benL28]

Was the projectile 30 degrees
And the last part of q14 2sin(alpha/2) ?

Yeah I got that for the last q, I screwed projectile up tho, one of my mates got 30 deg tho

 

[psmao]

But the expression wasn’t a binomial coefficient, it also included powers of 2 and x

i got 14 for the binomial one LOL maybe i made an arithmetic mistake
the trap are
1) for the temperature question, its asking the rate of change ie. dT/dt not T lol
2) the motion question, its asking the first time when "speed" reaches half of the maximum "speed" so you gotta consider both positive and negative.
3) i think there are more but atm i cant recall anything at the top of my head.

 

[Arrowshaft]

Yeah I got that for the last q, I screwed projectile up tho, one of my mates got 30 deg tho

what did you get for binomials

 

[Arrowshaft]

i got 14 for the binomial one LOL maybe i made an arithmetic mistake
the trap are
1) for the temperature question, its asking the rate of change ie. dT/dt not T lol
2) the motion question, its asking the first time when "speed" reaches half of the maximum "speed" so you gotta consider both positive and negative.
3) i think there are more but atm i cant recall anything at the top of my head.

Woops i meant 14, i was thinking about 15 becase of the k+1 term haha, we good i think

 

[Minecraft]

What, I got k=14. What was the answer to the distance of OA for the projectile one?

 

[AHafza]

What about q10 multiple choice

 

[Minecraft]

What about q10 multiple choice

I got 1

 

[AHafza]

What, I got k=14. What was the answer to the distance of OA for the projectile one?

Something involving root2 and root3 ?

 

[programen]

I got k=14 and subbed into a calculator to test

 

[Arrowshaft]

i got 14 for the binomial one LOL maybe i made an arithmetic mistake
the trap are
1) for the temperature question, its asking the rate of change ie. dT/dt not T lol
2) the motion question, its asking the first time when "speed" reaches half of the maximum "speed" so you gotta consider both positive and negative.
3) i think there are more but atm i cant recall anything at the top of my head.

yep I noticed the dT/dt don’t think it was a trap though as it was pretty obvious, maybe just a bit unconventional

yeah and for the max speed I worked out both positive and negative velocities and compared the two to see which one was shorter, agreed that was a bit of a trap

 

[psmao]

Yep i noticed the dT/dy

yep I noticed the dT/dt don’t think it was a trap though as it was pretty obvious, maybe just a bit unconventional

yeah and for the max speed I worked out both positive and negative velocities and compared the two to see which one was shorter, agreed that was a bit of a trap

maybe coz i have a "inertia" of finding T usually LOL

 

[TeheeCat]

Predictions for E4 cutoff?

I admit this paper was more doable than previous years. However, I definitely didnt perform the best I could today. I'm sad because i prepared hard for 3U for the past 2 years too...

 

[psmao]

Something involving root2 and root3 ?

i got iirc

 

[Arrowshaft]

OH NOOOO RIPPPP, I found the x coord of where the projectile landed on the ramp not the distance NOOOO

 

[Arrowshaft]

Predictions for E4 cutoff?

I admit this paper was more doable than previous years. However, I definitely didnt perform the best I could today. I'm sad because i prepared hard for 3U for the past 2 years too...

Maybe 74?

 

[StudyOnly]

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

Binomial was k=14 pretty sure