Thanks for the speedy reply. For Question 6 I got 3 solutions but failed to get the fourth, would I lose 1 or 2 marks? Also 2iii I said stretch but wrong scale factor, lose 1 or both marks? Again thanks!

drop 1 and drop 1

Reply 46

SophF_rth

19

Original post by czj1997

For question 7b)
I differentiated wrongly and ended up with a different power, and got the answer as -1/12. Do I get any marks?

Snap! Great to know we'll get some marks!

Reply 47

username1006802

5

Original post by Mr M

x

Thanks Mr M for posting this - really appreciate it. Just a quick clarification would be great - for the last question I didn't specify the units, I know this sounds silly but would I be penalised for not writing "square units" - I just underlined my answer of 40.

Thank you again.

OP

Original post by zintanax

Thanks Mr M for posting this - really appreciate it. Just a quick clarification would be great - for the last question I didn't specify the units, I know this sounds silly but would I be penalised for not writing "square units" - I just underlined my answer of 40.

Thank you again.

Just the number is fine.

Reply 49

chargedpieces

Hello Mr M. Thank you for posting the mark scheme.

My question is, On question 7) I don't remember if I did this, but if I made -3x^2+10x-3 positive (3x^2 -10x+3) Would I lose marks?

Thanks.

Reply 50

Killerpenguin15

20

for 5 (iii) I put 3x - 4y - 29/2 = 0 would this still be correct? Otherwise, how many marks would I lose?

Reply 51

seizetoday

12

For the 7 marker with the answer 6x-8y-29

I somehow did 21-8 rather than 21+8 and got -13 so i ended up with 6x-8y-13. Would that just be one mark lost? Thanks.

OP

Original post by chargedpieces

Hello Mr M. Thank you for posting the mark scheme.

My question is, On question 7) I don't remember if I did this, but if I made -3x^2+10x-3 positive (3x^2 -10x+3) Would I lose marks?

Thanks.

Yes you will drop 1 mark. You wouldn't change an answer of 7 to -7 would you? This is the same thing.

OP

Original post by Killerpenguin15

for 5 (iii) I put 3x - 4y - 29/2 = 0 would this still be correct? Otherwise, how many marks would I lose?

Drop 1 for failing to use integers.

OP

Original post by seizetoday

For the 7 marker with the answer 6x-8y-29

I somehow did 21-8 rather than 21+8 and got -13 so i ended up with 6x-8y-13. Would that just be one mark lost? Thanks.

Drop 1 mark if you had = 0 at the end.

Reply 55

Ommmar

1

Original post by Mr M

Mr M's OCR (not OCR MEI) Core 1 Answers May 2015

1.

4\sqrt3+4

(3 marks)

2. (i) Curve in second and fourth quadrants (2 marks)

(ii)

y=\frac{1}{2-x}

(2 marks)

(iii) Stretch parallel to y axis (or x axis) scale factor

\frac{1}{3}

(2 marks)

3. (i)

5^8

(1 mark)

(ii)

5^{-\frac{1}{4}}

(2 marks)

(iii)

5^{\frac{9}{2}}

(2 marks)

4.

x=27

or

x=-8

(5 marks)

5. (i) 5 (2 marks)

(ii)

6x-8y-29=0

(7 marks)

6.

x=2

and

y=1

or

x=\frac{14}{3}

and

y=-\frac{13}{3}

(5 marks)

7. (a)

-3x^2+10x-3

(4 marks)

(b)

-\frac{1}{48}

(4 marks)

8. (i) U shaped parabola passing through

(-1, 0)

,

(0, -3)

and

(\frac{3}{2}, 0)

(4 marks)

(ii)

x<-1

or

x>\frac{3}{2}

(2 marks)

(iii)

k<-\frac{25}{8}

(3 marks)

9. (i)

a=13

(5 marks)

(ii) Minimum (2 marks)

(iii)

x=\frac{1}{3}

(3 marks)

10. (i) Centre

(5, -2)

and radius 5 (3 marks)

(ii) Show ... (5 marks)

(iii) 40 square units (4 marks)

Do you have the Mechanics 2 ocr answers? It was really hard this year!

Reply 56

Jay Mistry

1

for question 2ii: I wrote y=-1/(x-2)
would the brackets there be penalized?

for question 6ii: I wrote 625root5 would I lose all 2 marks

for 7a: I wrote -3x^2-3+10x would the order of function be penalized

for question 8i: could I have the equation that you had to solve to find the three intercepts