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OCR MEI AS Mathematics Core 1 13/05/2013

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I got k as 0 and 12. The tried verifying the values k by subbing it back in the quadratic. Was 9 the proof if so I got 3n for the first one and said that 3 can be taken out. And the 9 part 2 I got 3n^2+2 and said 3 couldn't be removed. Not sure about part 2 though. I got (2,-7) as min point

I'm sure it said minimmum y value though ?

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Reply 61

Dan_JR_12

Original post by krishkmistry

I got that but did you divide it by 3 as means of explaining you couldn't fully divide it by 3 ?

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Yeah I got 3n^2 + 2 and divided it by three to show that would not give you an integer. To be on the safe side, I also used 5 in the equation so show it did not work using actual numbers rather than just equations

Reply 62

beautywithbrains

Doesn't anyone know if there an aqa thread for core 1 exam, sat today?

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Reply 63

Dan_JR_12

Original post by Herucles

coefficient was -2560

Good, that's what I got :smile:

Reply 64

Herucles

Original post by krishkmistry

I'm sure it said minimmum y value though ?

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yeah you only needed y value dont worry

Reply 65

Fordey

For last question i got K=0 and K= 4

Reply 66

Davelittle

Q 10: Circles
Q11: Polynomials
Q12: Graph drawing

Reply 67

Moon1ight

I think I've lost at max 20 marks on this paper - I need ideas of grade boundaries - especially for an A ? Anyone predict - btw though 20 marks is a lot of leeway I think for how many marks I lost

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Reply 68

Dan_JR_12

What answers did you get for 10 + 7root5 + 38/(1-2root5)

Reply 69

Rubyturner94

Original post by Herucles

I think I got everything right apart from retardedly writing 8a^8 instead of 8a^9...

last question was k=0 or 4, by discriminant = 0

distance between chord and centre was root10

on one of them the y intercepts (I think) were 2+root11 and 2-root11

cant remember much else

which y intercept?

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Reply 70

Matt_dragon

That was a very nice paper. FP1 was SO hard :frown:

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Reply 71

Jojo_555

I think this exam was hell of a lot easier than Jan :biggrin:

The only question that threw me was the last one, finding the value for K...what did everyone else get?
I think I got -1 and 1/4 :/
I'm so confident I got a freaking A :biggrin:

(Got a D last time lol)

Reply 72

Davelittle

I was aiming for full marks, i think i dropped 2-3 on the last question because of a stupid - sign -.-

ah well gotta hope i got the rest of it right

Reply 73

Dr.Monstaa

Oh well I don't think they'd mind. What did people get for the f(x+2)

Reply 74

Herucles

Original post by Dan_JR_12

What answers did you get for 10 + 7root5 + 38/(1-2root5)

8+3(root5)

Reply 75

Herucles

Original post by Rubyturner94

which y intercept?

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Im sorry I cant remember exactly :s - you may have had answer as (2+root44)/2

Reply 76

Dan_JR_12

Original post by Herucles

8+3(root5)

Good. Going by what everyone else got on all the questions and my answers I think I got an A on this paper :smile:

Reply 77

Soho32

Original post by krishkmistry

I'm sure it said minimmum y value though ?

Will I have got it wrong if I put both the x and y co-ords for the minimum?
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Reply 78

Moon1ight

Original post by Dr.Monstaa

Oh well I don't think they'd mind. What did people get for the f(x+2)

Sad thing is - they have done in the past - exactly the same question was asked and it said 0 for the coordinates ...

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Reply 79

Dan_JR_12

I can't remember what question I got the answer for, but did anyone get an answer for one of the questions (I think in Section B) to come out as (1 +/- root57) / 4 ?