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# OCR (not MEI) C1 - Wednesday 13th May 2015 watch

1. (Original post by Abbie2511)
It had to be in the form 5 to the power something, I got 5^(9/2)
Yeah that's what I got, at least I got something right
2. (Original post by naomi288)
I got 5^4.5 for the last indices question

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that's right
3. (Original post by AstroNandos)
I got that for whatever question or was

I got something like -3/16, I think I did it wrong
Yeah well I got -16/3

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4. (Original post by blinin7)
What expansion did people get for simultaneous equations. The rest was a breeze however I spent a good 30 min + solving :

3x^2 + 20x - 22 = 0

As y=-2x-5 so I just substituted. I think I got it completely wrong but I tried 5 different ways and came to the same expansion which I couldn't simplify...

Really hope grade boundaries are not higher than last year :/
Yea i spent ages on it!!!!
5. (Original post by naomi288)
I got 5^4.5 for the last indices question

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same
6. I got -1/48👀👀
7. (Original post by iloverobkardash)
Also, answers for the differentiate X^(1/3) where X=8 or something?
was that find the gradient of when x=8?

I got -1/48 for that
8. (Original post by TCO)
Yeah well I got -16/3

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I got - 1/48 :'(
And for the perpendicular through the midpoint I got 6x-8y-29 = 0
9. (Original post by Dentist214)
Great, lost 5 marks!!!! I got 11, no wonder I couldn't get the stationary point, I've done so bad
I got 11 too and it worked for the stationary point aswell. I'm not sure if it was right or wrong. The equation worked to get 4 again for the point and the unknown one too
10. What was the simultaneous equation answer?
11. (Original post by yazmin123)
what did you get for the simultaneous equations??
x=2
y=1

x=14/3
y=-13/3
12. The last indices question was 5^9/2 for those asking and the differentiation one was -1/48.
13. (Original post by exoticmedgirl_2017)
6x+4y-29?? Something like that... Might be the wrong question..? Sorry...
I put 6x-8y-29 I think
14. (Original post by TCO)
Yeah well I got -16/3

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Got -1/48 for this I think
15. (Original post by HecTic_H)
I got - 1/48 :'(
And for the perpendicular through the midpoint I got 6x-8y-29 = 0
I got both of those answers, im sure they are right.
16. (Original post by lily9666768)
yeah you just need 240 ums overall. you could get a C and two A's and still get an A
That gives me hope, would they need to be high A's in c2 and s1 like 65/72? Obviously depending on grade boundaries but never seen them higher than that
17. (Original post by AstroNandos)
I got that for whatever question or was

I got something like -3/16, I think I did it wrong
I got what you got
18. (Original post by blinin7)
What expansion did people get for simultaneous equations. The rest was a breeze however I spent a good 30 min + solving :

3x^2 + 20x - 22 = 0

As y=-2x-5 so I just substituted. I think I got it completely wrong but I tried 5 different ways and came to the same expansion which I couldn't simplify...

Really hope grade boundaries are not higher than last year :/
i think i got the expansion 3x^2 - 20x + 28 and it factorised
19. Were the simultaneous equations:

2x+y=5 AND x^2-y^2=3

OR

2x+y=5 AND x^2+y^2=3

Was an easy paper but subject to a fair few mistakes

My estimate is around 65/66, same as last year

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