Need the unofficial markscheme ASAP.. Mixed emotions about that exam.. Good paper but with some weird parts and amount of marks allocated to some questions didn't seem fitting.. Literally no idea how I've done!

Reply 2504

Alleykat606

Original post by Chazley123

many people actually missed q 9, a few did in my school lol

what was question 9??!!

Reply 2505

Bustamove

****, made the most stupidest mistake when converting sec2A + tan2A...

why the **** did I use Tan2A = 2tanA/1-Tan^A
I should have used sin2A/Cos2A

thats 4 marks down the ****ing drain...
what did everyone get for their solutions for part b)?

Reply 2506

Jonnyss

Original post by Neilg99

Not at all

How did u do the differentiating question which had to be in the form f(x)e^-2 ??

Reply 2507

ColeNate

For the range of g question:

Did factorise the cubic as to produce dy/dx=0 and then solve it, then substitute in the 2 x values to find the 2 y values?
I seem to remember substituting in [something+(root7)]/2 as one of my x values.

Reply 2508

i2yalls

Original post by Kill3er

Anyone get 1/24pi anywhere in any question?

I got it. Not sure what question though

Reply 2509

adamjhodg

The graph question (think it was question 2) definitely said state the asymptotes on both graphs so i put y=5 for the second graph even though i thought it was wrong?

Was there an asymptote and what was it?

Reply 2510

sj97

Original post by Ripper Phoenix

Absolutely correct but u had to put it in y

Posted from TSR Mobile

For the finding the coordinates of A, I only managed to get up to finding the gradient of the tangent as 1/20pi. Is that correct, and if so, how many marks do you think I'd be able to get? Also for the K question, I accidentally didn't give a range and simply said that k = + or - square root 20.

Reply 2511

shaoashao

9b and c and asymptote for the left bit

Reply 2512

TruMuslima

Original post by big fat poo

right for the range question I had a cubic: 2x^3 - 3x^2 + 3x
x(2x-1)(x-2) (I think)
Anyone else?

Yep I got that. But not sure about it.

Posted from TSR Mobile

Reply 2513

scales1996

Original post by Isymega

Guys why couldn't you do the inverse of the function??!!??

Not a 1-1 mapping :smile:

Reply 2514

Kill3er

Original post by ArtemMakushin

I'm not sure man, but I got a y coordinate being massive... Because the gradient of the line was 24pie for me... Did you get same?

Wasn't it 1/24pi

You worked out dx/dy and then had to do 1 over

Reply 2515

delpetra

Original post by jf1994

An asymptote is defined as a straight line that a curve approaches but never touches.

The curve in this case was the mod of an exponential function

Clearly the curve crosses y=5 so it is not an asymptote

So did you draw on an asymptote for that one?

Reply 2516

jf1994

Original post by Kill3er

Anyone get 1/24pi anywhere in any question?

Yep, for the gradient of the line where you had to find where it crosses the y-axis i think

Reply 2517

HGKID

Anyone else get 4 answers for 8b?? (The one using the proof where you got tan(2theta) = -1/3

Reply 2518

dandroff

Original post by dhamm

k was negative, meaning if you subbed a negative number into the numerator and denominator of the gradient function, they would always be positive. So gradient always positive, and the function is increasing.

Would i get marks for trying to find the y intercept of the graph, which was -0.5 i got. then find the turning point which was a maximum, and i prooved it by differentiating again. then sketching the graph out roughly and then saying its decreasing?

also, for the sketch the graphs question i used pencil would it scan through properly ?