3Unit Mathematics 2007 Solutions (2 Viewers)

[mattzada]

Hey all,

I took the time to write up some Extension 1 solutions (hand written).

Let me know what you think of my answers...do you agree or disagree?

According to my own solutions I lost 12-14 Marks (70-72/84)

What do you think you'll get Raw out of 84?

Thanks.

NOTE: INCORRECT answers in Solutions:
Q7(b)(iv) - greatest range occurs at 45 degrees - i.e. tan(theta) = 1 ...so m=1
Therefore the interval is 19.5 < x < 20.0 (since x = 20 when m = 1)
So the width is 0.5m

Link: http://members.optusnet.com.au/mattzada/3unit_maths_2007_solutions.pdf

 

[fishy89sg]

omg thanks so much man - this should (finally) determine my raw mark

 

[fishy89sg]

sorry for the repear double post, but based solely on your solutions, and assuming i get part marks for working, i should get:

Question 1: 12/12
Question 2: 9-10/12
Question 3: 11/12
Question 4: 11/12
Question 5: 11/12
Question 6: 11/12
Question 7: 10-12/12


= 75-78/84

Damn........... stupid errors

 

[Mooju]

eh.... hmmm i dunno i got the same as you.... =/ but im sure i got everything right as well =S

 

[mattzada]

sorry for the repear double post, but based solely on your solutions, and assuming i get part marks for working, i should get:

Question 1: 12/12
Question 2: 9-10/12
Question 3: 11/12
Question 4: 11/12
Question 5: 11/12
Question 6: 11/12
Question 7: 10-12/12


= 75-78/84

Damn........... stupid errors

what skool u go to dude?

 

[tehsky]

for Q. 2c
i got different answers like i think i got b being in the 30s
i tested both a and b and they both satisfied the eq and the conditions
x.x waah??
EDIT: fuck nvm >.< i got it wrong
1 mark for workin out then =[=[

thankss ^^
im looking at around 51 give or take a few marks outta 84 =]
hopefully scales to 35+ =]

 

[mattzada]

got exactly the same as you buddy (apart from some minor different ways of working out, the solutions are exactly the same to what i put in the exam) looks like me n you are looking for some 83-84/84 mark then! =DDD

LOL I didn't do all that in the exam I stuffed up a few things and ran outta time...so I'm gonna end up with like 70-72/84

 

[Mooju]

OHH ROFLROFLROFL alright then XDDD I thought you did that in the exam and just reproduced it. CAuse you're like I lost 10-12 marks, and you freaked me out cause I was soo confident at what i did that im pretty sure i got 99-100% T_T freaked me out XDD but still 70+ /84 if a pretty good mark compared to what others will get! =D

 

[roadrage75]

i've had a quick look through, and they all look pretty right, except 1e) - when you integrate x ^ (-1/2) it becomes -2x^(1/2)

 

[mattzada]

OHH ROFLROFLROFL alright then XDDD I thought you did that in the exam and just reproduced it. CAuse you're like I lost 10-12 marks, and you freaked me out cause I was soo confident at what i did that im pretty sure i got 99-100% T_T freaked me out XDD but still 70+ /84 if a pretty good mark compared to what others will get! =D

hope so

 

[mattzada]

i've had a quick look through, and they all look pretty right, except 1e) - when you integrate x ^ (-1/2) it becomes -2x^(1/2)

No...the '-' is outside

I'm pretty sure it's right ... anyone else agree / disagree

 

[izzy long]

that exam was pretty good, i was surpised there were no binomial expansions like the other years. your answers seem right to me by the way. im hoping to get a mark above 78 which was my trial mark. far out i got the newtons method one wrong, i dunno what i did but arrggghhhh

 

[izzy long]

that exam was pretty good, i was surpised there were no binomial expansions like the other years. your answers seem right to me by the way. im hoping to get a mark above 78 which was my trial mark. far out i got the newtons method one wrong, i dunno what i did but arrggghhhh

 

[AMorris]

All right I think, numerically at least (and ur integration for 1e is correct) apart from the very last question. the greatest range in the secodn interval will be achieved when m = 1 so the range should be 19.51 <= x <= 20 and the width should be .49.

 

[blackrifice]

damm the silly mistakes killed me again.

By the way Matt, Its Mohammad, and thankx for the answers

I got either 79 or 80, out of 84 that is.

5 marks worth of silly mistakes. Who loses marks in q1?

Anyway theres no point moping now, what's done is done and relax for a week till eco.

Stiqqie Iqqie

 

[mattzada]

All right I think, numerically at least (and ur integration for 1e is correct) apart from the very last question. the greatest range in the secodn interval will be achieved when m = 1 so the range should be 19.51 <= x <= 20 and the width should be .49.

I guess that's right then...

 

[mattzada]

damm the silly mistakes killed me again.

By the way Matt, Its Mohammad, and thankx for the answers

I got either 79 or 80, out of 84 that is.

5 marks worth of silly mistakes. Who loses marks in q1?

Anyway theres no point moping now, what's done is done and relax for a week till eco.

Stiqqie Iqqie

HAHAH kkk

 

[defaultPlayer]

mm question 5b .. did you have to add in 2! for the parents..

it asks what is the probability tat the 4 children are allocated seats next to each other? .

 

[sting24]

according to these answers i got 79/84, which is decent. Then this should be pushed up by scaling so hopefully 48 or 49 / 50

 

[fishy89sg]

what skool u go to dude?

its not one of the top (200) thats for sure :burn: