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# OCR MEI - C1 - 13th May 2015 watch

1. (Original post by Dudeycon)
2+2root11 / 5 or 4+4root11 / 10
Yes same! It didn't want us to sub it into the expression for the length did it? It just wanted what x is?

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2. (Original post by jpetersgill)
Yes same! It didn't want us to sub it into the expression for the length did it? It just wanted what x is?

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It just wanted x.
3. Anyone remember the binomial expansion question? (?x-?)^4
4. (Original post by sakuraton)
Anyone remember the binomial expansion question? (?x-?)^4
(3x-2)^4

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5. (Original post by sakuraton)
Anyone remember the binomial expansion question? (?x-?)^4
(3x-2)
6. Ugh got te triangle wrong then I got something with 176 in it I think woops.

Maybe I should try and improve at C2 then to make up for this xD
7. (Original post by DOPECYCLIST)
probs i cant remember everything bro. i know i got it right because i got 5 for the last question which was right i know that.

im mid way through my markscheme i will be about 30 minutes guys
Can you include how many marks each question was worth? Thanks. Also I put min point as (-2,9) because I forgot to multiply by 3. Do you know how many marks this would lose 😁
8. (Original post by Manexopi)
Ugh got te triangle wrong then I got something with 176 in it I think woops.

Maybe I should try and improve at C2 then to make up for this xD
THATS RIGHT, the answers in this thread are just simplified.
9. (Original post by Manexopi)
Ugh got te triangle wrong then I got something with 176 in it I think woops.

Maybe I should try and improve at C2 then to make up for this xD
If you did the quadratic formula you got rt176 which cancels to 4rt11
10. (Original post by Manexopi)
Ugh got te triangle wrong then I got something with 176 in it I think woops.

Maybe I should try and improve at C2 then to make up for this xD
This is probably right, if you got (4+sqrt(176))/10 this is correct

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11. (Original post by Velocity_)
i need help, question 7 on the june 2012 paper. How do you do this? i used the quadratic formula but obviously found the points it intercepts the x axis.... this is the only question i got wrote. thanks

If this is the question you are on about. It's pretty simple. Simplify the equation if you want.

a) Use F'(X) and substitute in x (4) to find the gradient of said point which is parallel to the tangent in which you substitute that gradient into y=mx+c. Then use (4,-1) as Y and X to find C. The rearrange it to make it ax+by+c=0.

b) Well... just integrate it, then use the points to find c...
12. 81x^4 - 216x^3 + 216x^2 -96x +16 I think was the binomial
13. I got that aswell.
14. (Original post by Dudeycon)
THATS RIGHT, the answers in this thread are just simplified.
Really?
Because I tried simplifying and it didn't work lol
15. I am guessing you guys done the paper. I oddly found 1b) and the last question to be the hardest. Bloody surds and coordinate geometry. However, found most of the paper relitively easy betting I lost around 4 marks on 1b and 10 from q10. Assuming I got no method marks.
16. (Original post by Dudeycon)
THATS RIGHT, the answers in this thread are just simplified.
manexopi is right 176 was inside the squared root bit.
#almost done will post after my history exam
17. On the earlier question of (25/9)^-1/2 I only put 3/5 instead of + or -
I'll probably lose a mark won't I
18. (Original post by jpetersgill)
By that you mean k>14/3 ? That's what I got

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k<-14/3
When you switch the minus you have to switch the sign so > becomes <
19. (Original post by jpetersgill)
This is probably right, if you got (4+sqrt(176))/10 this is correct

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Oh phew yeah that's what I got
20. (Original post by Rik21)
k<-14/3
When you switch the minus you have to switch the sign so > becomes <
Wtf I didn't get that lol I got k>14/3

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