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PART A T1 = 15 T2 = 19 T3 = 23 This is an Arithmetic Progression with first term 15, and common difference of 4. Hence, according to the formula Tn = a + (n-1)d the general term is Tn = 15 + (n-1)4 T12 = 15 + 44 = $59 PART B T1 = 1/2 T2 = 3/2 T3 = 9/2 This is a Geometric...

So what we have is essentially our plane (lets call the wing tips A & B) directly above a point on the ground (lets call this point C). We know that the distance of A to B is 30m, and that the angle that AB subtends at C is 14' (that is, angle ACB = 14'). What we want is the perpendicular...

i had 1) C 2) D 3) C 4) D 5) A 6) B 7) A 8) D 9) C <--- (obviously wrong, i feel like such a mong now) 10) B <--- (guessed this there was no way i was going to waste my time lol for those who are curious, the correct solutions (according to carrotsticks, realizenothing, and i...

integration by subs is definitely wrong in question 11.

i would guess it's a 0/3 since literally none of this proof is used in the actual valid method (i.e. constructing a tangent).

I think overall it was a fairly tough 3U exam especially compared to last years, but not that unbelievably so when you compare it to some of the exams from the early 2000s. Up to question 14 was fairly easy, and the induction was fine too. i'm estimating about a 56-57/70. how do you guys think...

because I made multiple stupid mistakes. the only thing in there that wasn't a stupid mistake was the volume of revolution that turned out to be 8pi/3 not 136pi/3 other than that, it's shit like putting -2<m</=2 when it clearly should have been m>/=2, m<-2

maybe so which would mean there is a considerable jump there but if you go back to the early 2000s it's harder again

if you disagree with a lot then i hate to break it to you, you've got a lot wrong. there aren't THAT many errors...

i don't understand how everyone has said "hardest exam ever". has nobody done the pre-2006 papers? they were all so much harder than the new ones. we had 10 multiple choice. come on, that already makes it easier. 100 marks to earn in 3 hours instead of 120 for all the exams pre-2012. sure last...

you should make a band 6 then. saying there is a cut off mark for band 6 in the exam is idiotic because the exam is 50% so if you did really well in assessments and the rest of your school also did pretty good in yesterday's exam you'll get a band 6. just try not to worry about this stuff :)...

well whether or not you get a band 6 depends on your assessment mark. from what others have been posting, my guess is that 80-83 will align to a low 90s / borderline 90s exam mark but your assessment makes a fairly big difference to your over band

speed is the magnitude (the absolute value) or velocity. over the next brief period of time the velocity will increase but it's magnitude will decrease as it prepares to turn around. 10.D is correct the rest of the answers are as follows: 1. D 2. B 3. A 4. A 5. C 6. D 7. B 8. B 9. C 10. D

how about a 94-95? reckon it'll scale up that much or just maintain?

then you're either a genius or you have read the thread. the correct answer is 8pi/3 not 136pi/3

you made a silly mistake on 11.b) it should be 3 not 2.5 also in 15.b) x^2 = (2 - sqrt(y))^2 you should have taken both the positive and negative roots when you square rooted it at the start and then subbed values to see that only the negative square root is valid. for example, sub (0,4)...

to be honest after rounding i think the stats will show 0% of the candidacy will get 4/4 for that question. i know of 1 person who noticed this during the exam hall and that's coming from a selective high (penrith as it may).

lol 2

i thought this was correct until now but i have been informed by a friend who just checked it that technically it's (2 +/- rooty)^2 and if you sub values you will find that the correct answer is x^2 = (2-sqrt(y))^2 = (4 - 4sqrt(y) + y)

no, it was sinx = 7sqrt(3)/26. the question explicitly stated find the exact value of sinx. that is as simple as it goes.