HSC Extension 1 Mathematics Predictions / Thoughts (3 Viewers)

[black.mamba]

Anyone know how to do the first part of 14 a)? Only question I couldn't figure out

equate coefficients of x^n on each side

 

[black.mamba]

equate coefficients of x^n on each side

Then use ncr = nc(n-r)

 

[Alistruggles]

Was this exam easier or harder than usual? I think I’m getting mid E3 I couldn’t do a single part of Q14 :/

 

[osnola]

last q of q13 tho fml u had to test on both sides of the discontinuity

There was a super easy way to do that one: let theta = arccos(x)
cos(theta)=x
draw a right angle triangle with theta as the angle, x as adjacent, 1 as hypotenuse and sqrt(1-x^2) as opposite
then tan(arccos(x)) = tan(theta) = opposite over adjacent = sqrt(1-x^2)/x

 

[Speed’o’sound Sonic]

How is everyone feeling after the exam? Are we happy with our results?

 

[Marshall17]

last q of q13 tho fml u had to test on both sides of the discontinuity

Noooooo

 

[Alistruggles]

Was this exam easier or harder than usual? I think I’m getting mid E3 I couldn’t do a single part of Q14 sad

 

[black.mamba]

new syllabus so it’s hard to tell, I’m guessing similar difficulty to previous years but I wouldn’t rly know

 

[Ooklei]

How is everyone feeling after the exam? Are we happy with our results?

Tbh, I'm more confident with this exam than the advanced exam.

 

[Marshall17]

There was a super easy way to do that one: let theta = arccos(x)
cos(theta)=x
draw a right angle triangle with theta as the angle, x as adjacent, 1 as hypotenuse and sqrt(1-x^2) as opposite
then tan(arccos(x)) = tan(theta) = opposite over adjacent = sqrt(1-x^2)/x

How many marks was that question? I just said same derivative so differ by a constant and subbed x=1...

 

[imtoouncreative]

Few hours til the exam... I'm just hoping there's not too many perms and combs questions

moments before disaster... that q14

 

[black.mamba]

How is everyone feeling after the exam? Are we happy with our results?

decent aside from the last part of q13 and I’m guessing no chance for state rank with 69?

 

[black.mamba]

How many marks was that question? I just said same derivative so differ by a constant and subbed x=1...

3 marks, we should get 2 right?

 

[Fabrizio]

What a stupid test. Legit didnt test half the syllabus but gave 8 marks to binomial

 

[大きい男]

What would a 65/70 align to?

 

[demonicblackcat]

no projectile motion :')))) ngl shed real tears whilst attempting the combinatorics q

 

[anthony___]

 

[shashysha]

they really chucked 3u projectile in 4u and called it a day?? also where was the stats swear half the new syllabus wasn’t touched

 

[Vitrecan]

tbh, I was disappointed that there was no projectile motion cause I studied that concurrently with physics.

 

[Althacommie]

That exam was messed up... Definitely harder than previous ones