** Higher Level Maths Paper 1 2012 Before/After **

Dicksboro_man

Lads in 1b(ii) i effectively made a cubic whose roots are 1 more instead of 1 less...
how many marks do ye think i'll lose? i mean, will it qualift as a blunder?

Tankosaur

nmd64 wrote: »

Do you reckon leaving it as 4ln(7) will be a slip or blunder or will they accept it as full marks?

4ln7 is correct but ln28 is wrong

when you multiply a power you can bring in the number as a power not a multiple.

The correct answer would be ln7^4

Wesc.

Dicksboro_man wrote: »

Lads in 1b(ii) i effectively made a cubic whose roots are 1 more instead of 1 less...
how many marks do ye think i'll lose? i mean, will it qualift as a blunder?

You read the question wrong. But effectively carried out the same method and answered the question correctly. So, I think it would very harsh to dock you anything more than a mark.

finality

Dicksboro_man wrote: »

Lads in 1b(ii) i effectively made a cubic whose roots are 1 more instead of 1 less...
how many marks do ye think i'll lose? i mean, will it qualift as a blunder?

Probably a misreading, you should only lose a mark as it didn't oversimplify the question.

Dicksboro_man

finality wrote: »

Probably a misreading, you should only lose a mark as it didn't oversimplify the question.

Wesc. wrote: »

You read the question wrong. But effectively carried out the same method and answered the question correctly. So, I think it would very harsh to dock you anything more than a mark.

ah no, you see lads what i did was i took the right answers from the part (i)
and did something like this with them


(x+2)-1= x+1

(x-1) -1= x-2

(x-3)-1= x-4

and used those roots instead of
x=-2-1= -3 (x+3)
x=1-1=0 (x)
x=3-1=2 (x-2)

you know? kinda gutted here. ye still think that'll only lose me a mark or two?

Stalin and rugby

Dicksboro_man wrote: »

ah no, you see lads what i did was i took the right answers from the part (i)
and did something like this with them


(x+2)-1= x+1

(x-1) -1= x-2

(x-3)-1= x-4

and used those roots instead of
x=-2-1= -3 (x+3)
x=1-1=0 (x)
x=3-1=2 (x-2)

you know? kinda gutted here. ye still think that'll only lose me a mark or two?

That almost caught me aswell, looks like blunder to me bro -3.

Wesc.

Dicksboro_man wrote: »

ah no, you see lads what i did was i took the right answers from the part (i)
and did something like this with them


(x+2)-1= x+1

(x-1) -1= x-2

(x-3)-1= x-4

and used those roots instead of
x=-2-1= -3 (x+3)
x=1-1=0 (x)
x=3-1=2 (x-2)

you know? kinda gutted here. ye still think that'll only lose me a mark or two?

Ah so you took 1 from the factors.. that's a tough one to call alright. You do realise the max you could lose is 3 marks though? So it's not too bad. Personally, I'd classify that as a blunder.

Theorems

Dicksboro_man wrote: »

ah no, you see lads what i did was i took the right answers from the part (i)
and did something like this with them


(x+2)-1= x+1

(x-1) -1= x-2

(x-3)-1= x-4

and used those roots instead of
x=-2-1= -3 (x+3)
x=1-1=0 (x)
x=3-1=2 (x-2)

you know? kinda gutted here. ye still think that'll only lose me a mark or two?

I did the exact same, so annoyed at myself
Hopefully they won't be too mean

Dicksboro_man

Wesc. wrote: »

Ah so you took 1 from the factors.. that's a tough one to call alright. You do realise the max you could lose is 3 marks though? So it's not too bad. Personally, I'd classify that as a blunder.

Stalin and rugby wrote: »

That almost caught me aswell, looks like blunder to me bro -3.

thanks lads, i was starting to get worried but 3 marks aint TOO bad...was hoping for full marks in paper 1 to give me a nice cushion for paper 2 (got 98% in P1 in the mocks, only 85% in P2) but ah well cheers again

Stalin and rugby

RedTexan

All that was required in question 4 (c) was to find b^2=ac using the common ratio and then use this to show the common difference in the arithmetic series was equal, right?

RedTexan

And for question 6 (c) (ii) was f'(x)=8cos^2(2x)+8cos(2x)+4? And for getting this far and making an equation with y=cos(2x) but going no further how many marks do ye reckon I'd get? I know it's anybody's guess, but just for a small bit of peace of mind!

finality

RedTexan wrote: »

All that was required in question 4 (c) was to find b^2=ac using the common ratio and then use this to show the common difference in the arithmetic series was equal, right?

Yup. That's how I'd have done it...

Dapics

Hey guys need your help.

For 2.C , I misread the damn question and for some damn reason when i multiplied across by x , i had x^2 + x =2x, i brought across the 2x and argued my case that it must be greater than zero.... i did this for both part i, and part ii, i am very very annoyed with myself, this is without a doubt the reason i will not get a b3 in my maths

I'm just wondering what marks will I get for each answer?

For c, part iii, i think i got that one right.

Stalin and rugby

Dapics wrote: »

Hey guys need your help.

For 2.C , I misread the damn question and for some damn reason when i multiplied across by x , i had x^2 + x =2x, i brought across the 2x and argued my case that it must be greater than zero.... i did this for both part i, and part ii, i am very very annoyed with myself, this is without a doubt the reason i will not get a b3 in my maths

I'm just wondering what marks will I get for each answer?

For c, part iii, i think i got that one right.

-1 as long as the question was not oversimplified

Dapics

Stalin and rugby wrote: »

-1 as long as the question was not oversimplified

You serious?

But the right answer is that any no. squared is greater than zero, i having made this huge blunder without recognising it argued that any no squared (sub no. in for x squared) plus a number (sub no in for x) is greater than zero....

Did it this way twice, taking into account my blunder, i would think the way i progressed with the question I was actually right in my hypotheses...

But I dont really know, are you sure it would be -1 off the answer?

Dapics

Helloxoxo wrote: »

It's definitely not a slip.. Probably blunder at least

So I take it that 3 off the answer?

Killian In The Name Of

As a Pass Maths student, reading this thread is making me feel slightly nauseous...

RedTexan

For question 6 (c) (ii) was f'(x)=8cos^2(2x)+8cos(2x)+4? And for getting this far and making an equation with y=cos(2x) but going no further how many marks do ye reckon I'd get? I know it's anybody's guess, but just for a small bit of peace of mind!

Stalin and rugby

Dapics wrote: »

So I take it that 3 off the answer?

You gotta stop worrying about that stuff bro, like I said if the question isn't oversimplified and the method is correct where you just wrote down the wrong number or whatever it's -1.

But tbh none of us can tell you for certain, forget maths p1 go take a tug get up early tomorrow morning, head down paper 2 bro Gotta work!

Stalin and rugby

RedTexan wrote: »

For question 6 (c) (ii) was f'(x)=8cos^2(2x)+8cos(2x)+4? And for getting this far and making an equation with y=cos(2x) but going no further how many marks do ye reckon I'd get? I know it's anybody's guess, but just for a small bit of peace of mind!

Part c will probs be 20 marks. 10 marks for differentiating correctly 5 for expressing in cos2x and 5 for the > 0 bit. Depends how everyone else does though

Dapics

Stalin and rugby wrote: »

You gotta stop worrying about that stuff bro, like I said if the question isn't oversimplified and the method is correct where you just wrote down the wrong number or whatever it's -1.

But tbh none of us can tell you for certain, forget maths p1 go take a tug get up early tomorrow morning, head down paper 2 bro Gotta work!

Shall do, I'm hoping to get an A2 in Paper 2, know co-ords,circle and trig off to a tee and know all theorems.... just need to focus on probability... thanks for your help man!

RedTexan

Stalin and rugby wrote: »

Part c will probs be 20 marks. 10 marks for differentiating correctly 5 for expressing in cos2x and 5 for the > 0 bit. Depends how everyone else does though

Yeah, hopefully I'll get 45 and maybe a couple of attempt marks there. Might just push me into solid A1 territory

RedTexan

Stalin and rugby wrote: »

Part c will probs be 20 marks. 10 marks for differentiating correctly 5 for expressing in cos2x and 5 for the > 0 bit. Depends how everyone else does though

Was that the correct answer for the expression of f'(x) though?

WestIRL

What classifies as an attempt mark? For lets say...... Q8 C (ii)? Or in Q2 B (ii) I was literally staring at X^2 + 2x + 1 and JUST SIMPLY COULD NOT THINK OF ITS FACTORS!!! I mean surely the examiner might throw me like 2 marks for that?

Epsi

WestIRL wrote: »

What classifies as an attempt mark? For lets say...... Q8 C (ii)? Or in Q2 B (ii) I was literally staring at X^2 + 2x + 1 and JUST SIMPLY COULD NOT THINK OF ITS FACTORS!!! I mean surely the examiner might throw me like 2 marks for that?

An attempt mark is performing the first step correctly in solving a problem.

RedTexan

WestIRL wrote: »

What classifies as an attempt mark? For lets say...... Q8 C (ii)? Or in Q2 B (ii) I was literally staring at X^2 + 2x + 1 and JUST SIMPLY COULD NOT THINK OF ITS FACTORS!!! I mean surely the examiner might throw me like 2 marks for that?

I'm hoping to get maybe 17 out of 20 for getting that far! I just frantically wrote that down and said it must be greater than zero, I hope I didn't scribble over in the heat of the moment

Izymunz

I need 85%.

finality

RedTexan wrote: »

For question 6 (c) (ii) was f'(x)=8cos^2(2x)+8cos(2x)+4? And for getting this far and making an equation with y=cos(2x) but going no further how many marks do ye reckon I'd get? I know it's anybody's guess, but just for a small bit of peace of mind!

Yeah that's correct.

liamduffy1994

Dicksboro_man wrote: »

ah no, you see lads what i did was i took the right answers from the part (i)
and did something like this with them


(x+2)-1= x+1

(x-1) -1= x-2

(x-3)-1= x-4

and used those roots instead of
x=-2-1= -3 (x+3)
x=1-1=0 (x)
x=3-1=2 (x-2)

you know? kinda gutted here. ye still think that'll only lose me a mark or two?

Did the same mate, was scribbling it at the end so Im happy with anything at all they give me