Maths HL P 1 - aftermath

chaoticmess

mark.oc wrote: »

I got that at first alright, but went back and checked it. The problem was with the definite integral of the part under the x-axis at one. That was 5, taken away from -27, gives -32. Modulus of that plus the original 5 gives 37.

Ohhhh that was sneaky....!
Still, would probably still get plenty of attempt marks right?!

Paddi Jones

Its really depressing reading all these "it was easy" answers. Though it certainly was an easier paper, I don't think I did too well. Nice (a) parts I must say, some annoying (c)s.

Only got 5 and a half Qs done.
Fab time management, eh?

scherzo!

I kept checking the front of my paper to confirm "Higher Level" written on it, then considered whether my colour vision was going all funky ("Is this really pink?") I liked it. =D

SantryRed

Just wondering what people got for Q1 b? How'd yous do it?

Caught

theowen wrote: »

That was fun...

OMG, really? I'm a complete weirdo then. I was totally calm, smiling through it. I actually sang The Club Is Alive and all to myself doing the last question [Q4 twas].

CantStandMeNow

Craaap.. anyone else give the De Moivre's theorum in carthesian form? i was wondering why it was so untidy it was supposed to be in polar form.. oh well.. it still worked out i just went a step too far they can't really take marks off surely..

Keogg

!?! wrote: »

anyone get around 167 I can't remember exactly for the purple?

dont worry i got 199:D oops! Dont mind though, did 8 as an extra question

A little surprised with the S&S in question 1, but then i was like, oh yeah, simple! Really don't agree with leaving out S&S as a whole question not covered, topics can be interchanged throughout pretty much every question. It really is as stupid as just studying Boland. lol.


I got the arg(z) as well. I mean arg... argument, I ended up with t=-8. Thrilled with myself:)

UglyFuc

you were supposed to leave the de moiver thing in polar form. it says in the question. for eg Cos72 is like 5 pi over 4 or something

dont put it down as decimels.

Gaga OhLaLa

mark.oc wrote: »

Q.1 (a) k = -3, t = 9

(c)(i) -3-b
(ii) -2-2b
(iii) b = -4, c = 1, d = 6

Q.2 (a) x = 3, y = -2, z = -1

(b)(i) 4
(ii) rt20 or 2rt5

Q.3 (a) x = 4, y = 2

(b)(i) ±6
(ii) -8

(c) Didn't take them down as they were all decimals.

Q.4 (a) 47/99

(b)(i) a = -42, d = 6
(ii) 0

(c)(iii) 27230

Q.5 (a) x = 2

(c)(ii) 47

Q.6 (a) x = 4/3

(b)(i) 2/5
(ii) line

(c)(i) [LATEX](-4-2xy^3)/(2+3x^2y^2)[/LATEX]
(ii) 2x + y - 6 is the tangent.

Q.7 (b)(i) 2/(1-2cosxsinx)

(c)(ii) minimum

Q.8 (a) -(cos2x)/2 + (e^4x)/4 + c

(b) 37 units

(c)(i) ln((1+sinb)/(1+sina))
(ii) ln((1+cosa)/(1+cosb))

THANK YOU
I do love you :P

I got pretty much the same answers and came out of the paper almost crying I was so sure everything was wrong!
These better be right...

Ashashi

Is that the real roots one? I did b^2 - 4ac greater or equal 0.

Then I got 16p^2 + 1 > 0

And I said that is p is real, and equal or greater than 0, it will always be greater than 0 due to the + 1, hence real roots.

It was a very project maths kind of question.

pn7xjrqy6fhta1

hey lads...not one bit happy...tink i barely passed!!even failed..jus wondering do you get attempt marks for trying every question..

niamhocxox

mark.oc wrote: »

Q.1 (a) k = -3, t = 9

(c)(i) -3-b
(ii) -2-2b
(iii) b = -4, c = 1, d = 6

Q.2 (a) x = 3, y = -2, z = -1

(b)(i) 4
(ii) rt20 or 2rt5

Q.3 (a) x = 4, y = 2

(b)(i) ±6
(ii) -8

(c) Didn't take them down as they were all decimals.

Q.4 (a) 47/99

(b)(i) a = -42, d = 6
(ii) 0

(c)(iii) 27230

Q.5 (a) x = 2

(c)(ii) 47

Q.6 (a) x = 4/3

(b)(i) 2/5
(ii) line

(c)(i) [LATEX](-4-2xy^3)/(2+3x^2y^2)[/LATEX]
(ii) 2x + y - 6 is the tangent.

Q.7 (b)(i) 2/(1-2cosxsinx)

(c)(ii) minimum

Q.8 (a) -(cos2x)/2 + (e^4x)/4 + c

(b) 37 units

(c)(i) ln((1+sinb)/(1+sina))
(ii) ln((1+cosa)/(1+cosb))

You're answer to 1 (C) part (iii) is wrong cause they were 3 consecutive numbers......eg.1,2,3.....I got my answers as fractions with a difference of 1 between them all......

mark.oc

Ashashi wrote: »

Is that the real roots one? I did b^2 - 4ac greater or equal 0.

Then I got 16p^2 + 1 > 0

And I said that is p is real, and equal or greater than 0, it will always be greater than 0 due to the + 1, hence real roots.

It was a very project maths kind of question.

Not trying to be snide, but it was also a very "every maths paper since 1995" question.

Caught

Analia Acidic Wolf wrote: »

hey lads...not one bit happy...tink i barely passed!!even failed..jus wondering do you get attempt marks for trying every question..

If you do one step right you do.

Are we talking about the Junior?

mark.oc

niamhocxox wrote: »

You're answer to 1 (C) part (iii) is wrong cause they were 3 consecutive numbers......eg.1,2,3.....I got my answers as fractions with a difference of 1 between them all......

They weren't consecutive integers, they were three consecutive terms in an arithmetic sequence. There's a big difference.

Rothmans

Just had a look on examinations.ie, it seemed like a fairly tame paper. No majorly unpleasant surprises.

Caught

Ahhh. I clicked Leaving instead of Junior. I was wondering why everything looked so wrong.

Woops, sorry!

KealanOCarroll

Rothmans wrote: »

Just had a look on examinations.ie, it seemed like a fairly tame paper. No majorly unpleasant surprises.

easy to say when your not in the hotseat.....3 was ******* by and standards....nobody seemed to know 100% what the arg bit was about

KealanOCarroll

mark.oc wrote: »

They weren't consecutive integers, they were three consecutive terms in an arithmetic sequence. There's a big difference.

whole stack of people in my year did that too....i knew lookin at it that it didn say integers it said consecutive terms but i hadnt a nothion so i jus took a stab at callin them B=B, C= B+1 and D = C+ 1....hopin for attempt marks!

niamhocxox

How did everyone do question 1 (c) part (iii)

Breezed through this Needed the confidence boost after English yesterday.

SantryRed

Can't remember what b c and d equalled but just let u1= b, u2=c and u3=d.

And then do u3-u2=u2-u1

mark.oc

niamhocxox wrote: »

How did everyone do question 1 (c) part (iii)

c - b = d - c
(-3 - b) - b = (-2 - 2b) - (-3 - b)

Solve for b and fill in for c and d into the eqs you got for (i) and (ii).

chaoticmess

mark.oc wrote: »

c - b = d - c
(-3 - b) - b = (-2 - 2b) - (-3 - b)

Solve for b and fill in for c and d into the eqs you got for (i) and (ii).

*cries*
That's stupidly simple now I know what to do.

pn7xjrqy6fhta1

Caught wrote: »

If you do one step right you do.

Are we talking about the Junior?

Leaving cert...iv looked at the answers nd it seems dat i only got bout 25 per cent of them rite...il tell u wat i did!!! in 1(c) i put x sqaured -x -2 into the equation...nd my answers were c=b-1 and d=2b-2...will i get attempts..in 3 b ii i put down 8 instead of -8 for the arg thing.. in the integration part i didnt do 1 bit of study on it so 4 the b parti worked out something nd got -32 for it...i crossed it out partily but will i get some marks still???im afraid the same thing will happen to me in paper 2!!!

ajjmk

Analia Acidic Wolf wrote: »

Leaving cert...iv looked at the answers nd it seems dat i only got bout 25 per cent of them rite...il tell u wat i did!!! in 1(c) i put x sqaured -x -2 into the equation...nd my answers were c=b-1 and d=2b-2...will i get attempts..in 3 b ii i put down 8 instead of -8 for the arg thing.. in the integration part i didnt do 1 bit of study on it so 4 the b parti worked out something nd got -32 for it...i crossed it out partily but will i get some marks still???im afraid the same thing will happen to me in paper 2!!!

exactly tha same as you...we better get some decent attempt marks..! :eek::p

Davidius

Had a look at the paper and thought it was a bit on the easy side. Hope this isn't the beginning of a trend oh wait project maths.

UglyFuc

did anynoe try solve the matrix by forming two simeltanoius equations?

Ashashi

mark.oc wrote: »

Not trying to be snide, but it was also a very "every maths paper since 1995" question.

Not really, usually, you don't need to explain, you just get (any no)^2 > 0.

TowlieMcD

Xevkin wrote: »

I thought the Higher paper was a cake walk with extra cake for all nothing unexpected, nothing challenging - apart from saying that the "curve" was a line :P

Agh ****! it WAS a line. is it the same thing if you say it only crosses the x axis once and that it has no turning points?? I think thats right...yes i think im ok...im trying to re-assure myself her

i though the paper was generally easy. what did everyone get for b,c and in q1?