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# OCR MEI - C1 - 13th May 2015 watch

1. (Original post by ACMilan323)
Hey guys in the 5 marker at the end where it asks you to find the range of values for K this is what I did:
b^2-4ac >0
(10)^2-4 (3) (13-k) > 0
100- 12(13-k) > 0
100- 156 + k > 0
-56 + k > 0
k > 56

I know it should be:
b^2-4ac >0
(10)^2-4 (3) (13-k) > 0
100- 12(13-k) > 0
100- 156 + 12k > 0
-56 + 12k > 0
12k > 56
k > 56/12

Don't know why I made that mistake, but considering it's out of 5 what do you think it'll get...
At least a 3/4

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2. (Original post by ACMilan323)
Hey guys in the 5 marker at the end where it asks you to find the range of values for K this is what I did:
b^2-4ac >0
(10)^2-4 (3) (13-k) > 0
100- 12(13-k) > 0
100- 156 + k > 0
-56 + k > 0
k > 56

I know it should be:
b^2-4ac >0
(10)^2-4 (3) (13-k) > 0
100- 12(13-k) > 0
100- 156 + 12k > 0
-56 + 12k > 0
12k > 56
k > 56/12

Don't know why I made that mistake, but considering it's out of 5 what do you think it'll get...

Thats what I did i think we will get 3
3. quote=FM2196;55739443]What did you guys get in the surd question?
Square root of 72 + 32/square root of 2?

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32=2 to the power of 4
2 to the power of a half
then take the powers away
4. what will i get for doing b^2-4ac like doing the method right but getting k>13/3 instead of 14/3, how many marks dropped out of 4?
5. Someone please post a mark scheme! So impatient!

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6. (Original post by ACMilan323)
Hey guys in the 5 marker at the end where it asks you to find the range of values for K this is what I did:
b^2-4ac >0
(10)^2-4 (3) (13-k) > 0
100- 12(13-k) > 0
100- 156 + k > 0
-56 + k > 0
k > 56

I know it should be:
b^2-4ac >0
(10)^2-4 (3) (13-k) > 0
100- 12(13-k) > 0
100- 156 + 12k > 0
-56 + 12k > 0
12k > 56
k > 56/12

Don't know why I made that mistake, but considering it's out of 5 what do you think it'll get...
I basically did the same, I did
-56 + 12k > 0
12k >56
k >5
im so annoyed with my self, for assuming 56/12 is 5. dumbest mistake to make
i reckon it will be 3/4 out of 5 for both of us,
7. (Original post by Darcy1)
Anyone know how you would go about getting predicted an A* for a level maths? Like what would you have to have gotten on this paper if you were to get the same mark on the other two
Should aim for 90+ ums average over your AS modules, but if you're cool with them you can convince them to bump you up...
8. nvm
9. How many marks was it for showing that the graph is always above the x-axis?
10. (Original post by Supergirlxxxxxx)
Omg I got k>14/3 as well but then wrote -14/3k<k<14/3 because it said it had two distinct roots

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Omg I got k>3/14 isn't that right

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11. (Original post by Spelly456)
How many marks was it for showing that the graph is always above the x-axis?
5 i think...probably 3 for completing the square
12. (Original post by Supermanxxxxxx)
Omg I got k>3/14 isn't that right

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Lol stop trolling

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13. what did you guys get for the (2x-3)^4 question?? pascals triangle stuff
14. The only throng the r>0 meant was that the root is not complex... The other side should have +/- as e.g -2 x -2 is 4 so the square root of a positive could be a negative ... But again probably won't loose marks either way as usually in brackets on mark scheme
15. Someone amazing make a markscheme and tell us if you are!!!! Im just sat here waiting aahahhaa
16. (Original post by TazLi)
Someone amazing make a markscheme and tell us if you are!!!! Im just sat here waiting aahahhaa
someone earlier said they were at like 12
17. anyone remember what q12ii was asking
18. (Original post by chelseachampions)
someone earlier said they were at like 12
Yeah and then disappeared from the face of the earth ahhaa
19. (Original post by chelseachampions)
anyone remember what q12ii was asking
I think that was to complete the square and hence show that the curve lies above the x-axis.
20. My teacher had the question paper and went through all the answers but I was too eager to get home and start revising stats so I didn't bother writing the answers down or anything lol

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