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AQA Maths Pure Core 1 MPC1 Jan 13th 2012

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Reply 100

louisjevans

Original post by MrPhamtastic

I am EXTREMELY confident that I range between 90 - 100% :biggrin:

EASY paper.

same

Reply 101

MrPhamtastic

Original post by louisjevans

same

How did you sketch your circle? I believed I drew mine just about sitting on the x-axis at -7, but not touching the y-axis. I just need to confirm it with others because it's really bugging me xD

Reply 102

ryanboi

Original post by Pomponz

Hmmmmm I thought It was different from the last papers but I think I still managed to do it allright. what did you guys get in the last part of the question where they ask for the width? I got 6 and 7 but somehow a lot of people got 0<x<8 :s-smilie:

6 and 7 i got too. Because thats the only two number that fit into both the inequalities. But some of my friend put something bout 5.5??

Reply 103

Dirtybit

Original post by ryanboi

6 and 7 i got too. Because thats the only two number that fit into both the inequalities. But some of my friend put something bout 5.5??

Atleast it's only a one mark question :rolleyes:

Reply 104

louisjevans

Original post by MrPhamtastic

How did you sketch your circle? I believed I drew mine just about sitting on the x-axis at -7, but not touching the y-axis. I just need to confirm it with others because it's really bugging me xD

i did that :smile:

Reply 105

ryanboi

Original post by Pomponz

Really? The integration gave me really nice numbers. Oh damn, this is going bad >.<
My shaded area was 6. 8-2(Area of triangle). >.<
What was the value of k for the first page last exercice?
I think mine was k=-92/11.
Oh confusion! >.<

shaded area was right 2. I got that too but i got a positive 92/11. The equation was 11y=8x-92.
we finding k and y is 0, so x should be positive.

Reply 106

KING2011BOB

Original post by ryanboi

shaded area was right 2. I got that too but i got a positive 92/11. The equation was 11y=8x-92.
we finding k and y is 0, so x should be positive.

S0 11y=0 and so 0=8x-92 so the answer therefore is 92=8x ... 92/8 = x = 11.5 soz bro -you will only drop 1 tho so never fear :smile:

Reply 107

ryanboi

Original post by KING2011BOB

S0 11y=0 and so 0=8x-92 so the answer therefore is 92=8x ... 92/8 = x = 11.5 soz bro -you will only drop 1 tho so never fear :smile:

Sorry lol but i type the wrong thing. I did put 92/8 :smile:

lol phew was looking at someone post writing c=92/11. lol

What did you get for width of garden?

Reply 108

louisjevans

Original post by ryanboi

Sorry lol but i type the wrong thing. I did put 92/8 :smile:

lol phew was looking at someone post writing c=92/11. lol

What did you get for width of garden?

5.5<x<8

Reply 109

KING2011BOB

Original post by ryanboi

Sorry lol but i type the wrong thing. I did put 92/8 :smile:

lol phew was looking at someone post writing c=92/11. lol

What did you get for width of garden?

I put it was 8 because -12 width is impossible but I think i messed up the inequalities somehow tbh

I got x>8 or x<-12,

Reply 110

ryanboi

Original post by louisjevans

5.5<x<8

Dammit ! was aiming for 100 UMS :frown:

lost one mark ! :frown:

i put 6 and 7 which kinda make sense but forgot bout the decimal place !

Reply 111

ryanboi

Original post by KING2011BOB

I put it was 8 because -12 width is impossible but I think i messed up the inequalities somehow tbh

I got x>8 or x<-12,

no the inequality is -12<x<8

Reply 112

spiral1

I'm soooooo upset...it was a horrible paper...but i'm glad i'm not the only one who found it hard.

Reply 113

ryanboi

do you guys reckon they will lower down the grade boundaries, so that people can still get 100 UMS without getting full marks??
Majority people from my school actually found the math paper alright.

Reply 114

Pomponz

Original post by ryanboi

Dammit ! was aiming for 100 UMS :frown:

lost one mark ! :frown:

i put 6 and 7 which kinda make sense but forgot bout the decimal place !

Yeah that happened to me as well. I was aiming for 100UMS and put 6 and 7 and completly forgot about 5.5 >.<

Reply 115

Pomponz

Original post by Dirtybit

Atleast it's only a one mark question :rolleyes:

You sure it was only one mark? I could swere the exercise was worth 3 marks. :frown:

Reply 116

AndyHoughton

I thought the paper was fairly fine but very awkward in some places.
The only ones I think I got wrong were the range of values for the width of the garden (which I actually thought was 5.5 < x < 8 but thought that it was too complex for one mark so put 6,7.. :frown:

) and also there was one were it said "show that x=-1 is a minimum" I think it was 3 marks..
my maths teacher said one mark for stating dy/dx = 0
one mark for d2y/dx2 > 0
one mark for hence minimum, and i forgot the dy/dx = 0, i think a lot of others may have done that too :/
I really hope I got over 90% though

Reply 117

Alex0619

Original post by Pomponz

You sure it was only one mark? I could swere the exercise was worth 3 marks. :frown:

you'll get method marks probably

Reply 118

Emor

Original post by AndyHoughton

Yes the discriminant was really ridiculous, in the end i think i got
-96k^2 +56k + 96 =0
changed the signs, divided by 8 then got it
then the also ridiculous factorising which took me 5+ minutes to figure out it went from
12k^2 - 7k -12=0 to
(4k+3)(3k-4)=0
getting k as -3/4 and 4/3

I got that too, though I didn't cancel it out by 8 so spent the best part of 10 minutes -____-. Feel kind of dumb now in retrospect.

I don't think I got some of that question right though.

EMZ=]

Reply 119

Pomponz

Original post by Alex0619

you'll get method marks probably

I hope so. It was the only exercise I got wrong. If its worth only 1 mark there's still a chance to get 100UMS but if it is 3 marks then I think ill get something around the 90's. I don't think my method was that great as I worked some stuff in my head and didnt actually write down....Ah well :frown: