Mathematics Extension 1 Exam Predictions/Thoughts (1 Viewer)

[Arrowshaft]

Guys I was wondering for Q14b part iii, I proved f(x1) is negative and f(x2) is positive therefore alpha is between x1 and x2, but I forgot to prove x2 is greater than x1. However I remember in part i I explained that alpha has to be greater than k (which is x1), so could it still count?

Yeah thats what I did, i think as long as you stated the usual stuff like f(x) is continuous over the interval and there is a sign change you’re good. I think it is fine because they already provided the range that alpha lies between the two values, so you just have to show the sign change.

 

[Arrowshaft]

any idea what a 57-58/70 would scale to

Ez e4.

 

[llatz_]

What year would you guys compare this exam toooo?

 

[Arrowshaft]

What year would you guys compare this exam toooo?

2014, not hard but harder than average

 

[Time&moretime]

Could someone put me out of my misery & tell me if my internal mark is 80 and my HSC mark is around 80 (either 55 or 56 out of 70), what would my HSC mark be? What does it scale to? In need of opinion urgently, thanking you ahead for any thoughts.

 

[Arrowshaft]

Could someone put me out of my misery & tell me if my internal mark is 80 and my HSC mark is around 80 (either 55 or 56 out of 70), what would my HSC mark be? What does it scale to? In need of opinion urgently, thanking you ahead for any thoughts.

What’s your internal rank at school, if you’re not first by how much (%) is rank 1 beating you by, and your school ranking?

 

[Time&moretime]

I am 2nd place in Math extension 1 by 4 percent. Rural school

 

[Time&moretime]

What’s your internal rank at school, if you’re not first by how much (%) is rank 1 beating you by, and your school ranking?

Thanking you for any thoughts.

 

[Arrowshaft]

I am 2nd place in Math extension 1 by 4 percent. Rural school

That should be e4 then

 

[Solanaceae]

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

I got 15 as well haha

 

[Time&moretime]

That should be e4 then

Thankyou for your reply. Really appreciate your opinion. I was aiming for an ATAR of 92, maybe there is still hope.

 

[Idkwhattoput]

View attachment 27456

Exactly what I did

 

[ruthvik]

How do you think our test compares in difficulty to those of previous years, cuz I thought last yrs exam was apparently hard but 80 raw was needed for an E4.

71 raw would get you a 90 in that exam

 

[Arrowshaft]

71 raw would get you a 90 in that exam

I doubt it’d be a 71 raw, 71 went to an 89 in 2018, and it definitely wasn’t harder than 2018 imo.

 

[InteGrand]

View attachment 27456

 

[Arrowshaft]

Yeah that’s what I was thinking. I didn’t want to say anything because more than one person agreed with the same method. Thanks for clearing it up.

 

[Jig]

How much marks do u guys reckon you'd lose for having k=5 for that question, for some reason i didn't realise the question said x^k and x^(k+1) and rather just saw k and k+1 and did the whole procedure correctly, but with the wrong terms or whatever lol.

 

[Arrowshaft]

How much marks do u guys reckon you'd lose for having k=5 for that question, for some reason i didn't realise the question said x^k and x^(k+1) and rather just saw k and k+1 and did the whole procedure correctly, but with the wrong terms or whatever lol.

Maybe you’ll get 2/3 because even though it was wrong, you still continued through and found the result if it WERE what the question asked

 

[Arrowshaft]

How many marks you guys reckon I’d lose for accidentally finding the primitive of the integral to be tan inverse instead of log, but still continued through to evaluate it?

 

[luckystrike826]

How many marks you guys reckon I’d lose for accidentally finding the primitive of the integral to be tan inverse instead of log, but still continued through to evaluate it?

probably 2? my teacher says error carried forward doesn't work this way because you've changed the nature of the question