[mcol2010]

Anyone sit this paper today and wanna help create unofficial marks scheme?

[Alfie1993]

[Hi yeah I did this exam as a repeat. I thought it was quite reasonable. How did you find it?

[maaa]

The C3 exam today was ok, but they worded the questions differently. Does anyone want to compare answers?

[Alfie1993]

Yeah they did! Yeah what answers did you get?

[maaa]

Some of mine could be wrong, but here are mine anyway:

1a. x=2 and x=-5
b. x-3/x-5

2a. Partial fractions: 4/x+2 - 3/x-5
b. 1+3x+9x²

[maaa]

3i. (x+1)(y-6)= -2
ii. touches the x axis at point: x= -2/3

4a. 2-ln3
b. integrating= 5x²/2 + cotx +c
c. d/dx= 2sec²2x(x-3)+3tan2x / (x-3)²

[Alfie1993]

Yeah I got all the same as you for those 4 questions except for 4c I got 2secsquared2x (2x-6) -tan2x over (x-3) squared!

[maaa]

5i. y=af(bx) where a= 3 and b= 2
ii. Transforming graphs: point A is (-2,-4), point B is (0,-4), point C (4,-4) and point D is (6, but the y coordinate is unknown)

6i. Just proving that the root lies between x=0 and x= pi/2
ii. Using Raphson Method twice. First time, x=0.5 and second time, x=0.586 (3sig fig) using x=0 as the first value.

7. This question I found was very intimidating because I had to differentiate such a long equation. My overall answer was 9y-4x-14=0 in the form that they wanted. If you want the answers in more detail, please ask!

8a. It was to prove a trig identity, which was ok.

b. I know my answers are wrong so I will not give it!

Please share your answers too!

[maaa]

(Original post by Alfie1993)
Yeah I got all the same as you for those 4 questions except for 4c I got 2secsquared2x (2x-6) -tan2x over (x-3) squared!

Yes, I am not sure if I got that right... so you might be correct

[Alfie1993]

(Original post by maaa)
5i. y=af(bx) where a= 3 and b= 2
ii. Transforming graphs: point A is (-2,-4), point B is (0,-4), point C (4,-4) and point D is (6, but the y coordinate is unknown)
Yeah I got this!

6i. Just proving that the root lies between x=0 and x= pi/2
ii. Using Raphson Method twice. First time, x=0.5 and second time, x=0.586 (3sig fig) using x=0 as the first value. Same

7. This question I found was very intimidating because I had to differentiate such a long equation. My overall answer was 9y-4x-14=0 in the form that they wanted. If you want the answers in more detail, please ask! Here I got 4x-y-2. That could be wrong though!

8a. It was to prove a trig identity, which was ok.

b. I know my answers are wrong so I will not give it!

Please share your answers too!

For 8b I got 11/24 pi and 19/24 pi. But I think there was supposed to be two other answers here too!!

[maaa]

OMG I got that answer too! But I compared it to one my friends and she got 4 answers, so I assumed I was wrong!

[magic024]

may i ask what exam board was this with?

[maaa]

CCEA

[Alfie1993]

Yeah I think we just left out a bit at the end! But I think we should only loose 1-2 marks
Has anyone else done this paper that can compare with these answers?

[mcol2010]

(Original post by Alfie1993)
For 8b I got 11/24 pi and 19/24 pi. But I think there was supposed to be two other answers here too!!

Yea think i have made some errors as well lol i only need to go from 79 UMS to 82 UMS and I get my A so heres hoping.

As for my answers pretty much the same except:

4c) i dunno how but managed to end up with -cosecxtanx - cotx/x-3

7) i got 7x-4y+1=0 again obviously ive went wrong somewhere

8b) 13/24 pi and 35/24 pi

hioefully I get some method marks tho

[maaa]

(Original post by Alfie1993)
Yeah I think we just left out a bit at the end! But I think we should only loose 1-2 marks
Has anyone else done this paper that can compare with these answers?

I really hope so! Need my A in Maths!

[maaa]

(Original post by mcol2010)
Yea think i have made some errors as well lol i only need to go from 79 UMS to 82 UMS and I get my A so heres hoping.

As for my answers pretty much the same except:

4c) i dunno how but managed to end up with -cosecxtanx - cotx/x-3

7) i got 7x-4y+1=0 again obviously ive went wrong somewhere

8b) 13/24 pi and 35/24 pi

hioefully I get some method marks tho

I am sure you will get working out marks and marks from errors carried forward. I did a past paper a couple of weeks ago and I got a teacher to mark it. Even though my answer was completely incorrect, I still got marks for working out. So the more working out you do, the more likely you will get nearly full marks!

[mcol2010]

(Original post by maaa)
I am sure you will get working out marks and marks from errors carried forward. I did a past paper a couple of weeks ago and I got a teacher to mark it. Even though my answer was completely incorrect, I still got marks for working out. So the more working out you do, the more likely you will get nearly full marks!

Awe cheers feel better now C4 next Fri paper always baffles me grand with past papers but as soon as in the exam im looking at in going WTF!!

[maaa]

C4 is horrible. Past papers and exam are as bad as each other.Totally not looking forward for this exam at all

[Guin]

(Original post by maaa)
5i. y=af(bx) where a= 3 and b= 2
ii. Transforming graphs: point A is (-2,-4), point B is (0,-4), point C (4,-4) and point D is (6, but the y coordinate is unknown)

6i. Just proving that the root lies between x=0 and x= pi/2
ii. Using Raphson Method twice. First time, x=0.5 and second time, x=0.586 (3sig fig) using x=0 as the first value.

7. This question I found was very intimidating because I had to differentiate such a long equation. My overall answer was 9y-4x-14=0 in the form that they wanted. If you want the answers in more detail, please ask!

8a. It was to prove a trig identity, which was ok.

b. I know my answers are wrong so I will not give it!

Please share your answers too!

I got 4x-y-2=0 for this q, when I first saw it I thought it looked nasty but it actually wasn't too bad There were 4 answers for the last question because it was 2 theta. I loved this paper!