Maths HL Paper 2

muffinz

mahonykid wrote: »

i got k=1 or k= 7 prop wrong dow but i went through the right method:p

i ended up with like 0.32 and some other random number XD i did the right mehod though i think, i did u.v over [v]= 1?

Ashashi

Not liking it, Paper 1 was better, made a hash of the question 8 and 4c, quite annoyed iwth myself. Ugh.

Reillyman

Anyone else get these answers?

1.(b)(ii) [latex] k=-17, k=-47[/latex]


4.(c)(iii) [latex] r=\frac{bc}{2a}[/latex]


5.(c)(ii) [latex] x= 10^{\circ}, 70^{\circ}, 130^{\circ}, 190^{\circ}, 250^{\circ}, 310^{\circ} [/latex]


6.(a) [latex] \frac{2}{7} [/latex]


8.(a) [latex] x\log_e x -x+c [/latex]

(b)(ii) [latex]12\sqrt3 [/latex]

(c)(ii) [latex]\frac{331}{1440} [/latex]

H2student

muffinz wrote: »

i got 20 too, itg was k^2 = 400 or something like that

I somehow had K^4 = 160,000. Then said k=+/- 20

Messi 10

Here are I think the answers to the probability q's

6 (a) 1/6

b proof

c 6 times. Loads of different methods used but once you got 6 you're ok.



7.a don't remember the exact figure but it was 26x36x36x36

b 7/20

1/40

19/24



c 3a, rt2

cant remember the second mean but im pretty sure I got it.
3rt2 was the second deviation.

monaghanman10

wat an unreal paper.all 8 questions done in hour and half.anyone else do question 9

mahonykid

muffinz wrote: »

i ended up with like 0.32 and some other random number XD i did the right mehod though i think, i did u.v over [v]= 1?

ya had to leave it equal to -1/rt2 not one:P

muffinz

JerCotter7 wrote: »

Oh yea I got mixed up there sorry. Yes CB is = OA.

And OR = 2OC which is written as R = 2C. Has to be from the origin so it is right.

yeah i got what OC was, then what OR was...and it could be seen that 2oc = or! but i didnt actually prove it, i just what they were, then said since it was obvious it was, therefore they were linear.. will i lose marks for not proving it, or do u have to, and how do u prov it if so?

eoins23456

wat answers did people get to quesiton nine probability option?

mahonykid

the line question was ......DACENT !!:):p

hmmmm52

Reillyman wrote: »

Anyone else get these answers?

1.(b)(ii) [latex] k=-17, k=-47[/latex]

I got those!!!
but i don't think anyone else did. . . .. also got same answers for your question 8 but not the trig

JerCotter7

muffinz wrote: »

yeah i got what OC was, then what OR was...and it could be seen that 2oc = or! but i didnt actually prove it, i just what they were, then said since it was obvious it was, therefore they were linear.. will i lose marks for not proving it, or do u have to, and how do u prov it if so?

Well if you showed that 2c = r then that is it proven. Just have to say it's collinear then.

DGRulz

Despite the fact ive gotten 70% on papers much harder than this For some reason I could do enough of it. got everything but 1bii, 3cii, all of 46 b and c, got 7 b done but the answer seemed dodgy and could do 8 b or the cii/iii. Might have just scrapped a pass. Otherwise I've just lost all but one of my CAO choices

monaghanman10

question 9
a)0.6826
b)0.003
0.202
0.561
c) 78.339 and 81.663
my dads a maths teacher so these answred have been verified:)

muffinz

mahonykid wrote: »

ya had to leave it equal to -1/rt2 not one:P

what?!why?! uber confused!!

eoins23456

yeah got all those answers.that question was such a stroll

mahonykid

muffinz wrote: »

what?!why?! uber confused!!

we are on about question 2bii??? yes ??:eek:

eoins23456

muffinz wrote: »

what?!why?! uber confused!!

cos it told u the ansle was equal to -1/rt2
so it wud be k-2/rt5.rt k squared plus 1 =-1/rt2

Messi 10

monaghanman10 wrote: »

question 9
a)0.6826
b)0.003
0.202
0.561
c) 78.339 and 81.663
my dads a maths teacher so these answred have been verified:)

Those are the exact answers I got. Beautiful.

JerCotter7

eoins23456 wrote: »

cos it told u the ansle was equal to -1/rt2
so it wud be k-2/rt5.rt k squared plus 1 =-1/rt2

It said cos was = to that? I put it the degrees for cos and used the graph to go from u to get the possible values of k? Think I got -2 and 4.

Making It Bad

Grrrr... forgot my "+c" in integration by parts. As amateur as it gets....

mahonykid

Making It Bad wrote: »

Grrrr... forgot my "+c" in integration by parts. As amateur as it gets....

awh fuk sake me too half a percent down the drain

randylonghorn

Caron wrote: »

shut up u ******. u try doin the leaving cert again!

Second example of personal abuse I've encountered from this poster to-day.

3 days ban.

Pimptastic

Did anybody else change sin 1/2 to radians in question 8ciii? And also how many marks would you lose for saying that the area of the rectangle is half the size it actually is? Would that just be a blunder?

muffinz

eoins23456 wrote: »

cos it told u the ansle was equal to -1/rt2
so it wud be k-2/rt5.rt k squared plus 1 =-1/rt2

omg sorry i was thinking about the trif question where it was equal to tan!! sorry

mahonykid

Pimptastic wrote: »

Did anybody else change sin 1/2 to radians in question 8ciii? And also how many marks would you lose for saying that the area of the rectangle is half the size it actually is? Would that just be a blunder?

if u doubled ur answer at the end you wouldnt lose any

IrishKev

Anybody get 53/120 for Q7 b)ii)? I got 7/20 and 1/40 for the other ones but part three was tricky enough. Deadly paper though, delighted with it after an only ok paper 1!

eoins23456

JerCotter7 wrote: »

It said cos was = to that? I put it the degrees for cos and used the graph to go from u to get the possible values of k? Think I got -2 and 4.

yeah so u put cos equal to that equal to -1/rt2
got k=3 and k=-1/3 not sure if its right though

eoins23456

muffinz wrote: »

omg sorry i was thinking about the trif question where it was equal to tan!! sorry

oh right ok haha just confused the hell out of me there:p

yaknowamsayin

straight_As wrote: »

Leaving cert maths has gone to the shitter.

That paper doesn't compare to the early 2000's.

Be bloody glad that you're getting an easy A1. And if you didn't get an A1 then you're the ****ter