AQA A Level Maths Core 1 - 18th May 2016 [Exam Discussion]

everyone saying they used a triangle or trapezium for the shaded area... I used a parallelogram xD didn't have time to finish the question though

Reply 181

timtjtim

2

Original post by yasaminO_o

Am I the only one who did a trapezium for the shaded are question to get a final answer of 63 - 5 = 58?

The integral should have given 81/4

Then the area of the triangle was 9, which equals 36/4. 81/4 - 36/4 = 45/4 or 11.25

Reply 182

voltz

6

What are you guys predicting for the grade boundary for B and an A?

Reply 183

clairebear101

11

Original post by voltz

I got 65... so that means i got it wrong

No 65 is right as it said wrote it as k, not k squared

Reply 184

haza01

It was something like -3/2 and 4

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Reply 185

username1692103

12

Does anyone know how many marks I'd lose by putting 4.25 (11/4) isntead of 20.25 (45/4) because I minused 8 instead of +8? I'm thinking 3/5 ?

And then on the orher question I used a trapezium, meaning the area was wrong, but I at least minused it from my original area, would this get a mark? Or just 0/3?

Hopefully grade boundaries are a bit lower.

Reply 186

Parhomus

8

Original post by ronnydandam

surely it would be root 34? since in the form (x-a)^2 + (y-b)^2, k was 34

As previously said, you only do the (x-a)^2-d+(y-b)^2-c=k when you get given something like x^2+2ax...
They gave you A so you could use the pythagorean triangle with C to find √65.

Reply 187

кяя

11

Original post by timtjtim

The integral should have given 81/4

Then the area of the triangle was 9, which equals 36/4. 81/4 - 36/4 = 45/4 or 11.25

I got 119/3
****

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Reply 188

timtjtim

2

Original post by HazNut134

everyone saying they used a triangle or trapezium for the shaded area... I used a parallelogram xD didn't have time to finish the question though

It was a triangle I'm afraid.

http://imgur.com/BQHVU5x

Reply 189

haza01

I can't bloody add I did 49 +16 is 64 not 65 so k equals 8. Which in turn meant I got the length CT wrong. I did all the working correct but not my final answer, do you reckon I can get any marks?

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Reply 190

moe889

7

how do you work out coordinate of q

Reply 191

blues123

2

does anyone remember the actual integration question

Reply 192

timtjtim

2

Original post by haza01

I can't bloody add I did 49 +16 is 64 not 65 so k equals 8. Which in turn meant I got the length CT wrong. I did all the working correct but not my final answer, do you reckon I can get any marks?

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Sure, you'll get some method marks. That's probably 2 or 3 less than full there.

Reply 193

haza01

In the circle question?

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Reply 194

voltz

6

Original post by haza01

I can't bloody add I did 49 +16 is 64 not 65 so k equals 8. Which in turn meant I got the length CT wrong. I did all the working correct but not my final answer, do you reckon I can get any marks?

Posted from TSR Mobile

Same here, I got 64 aswell but didnt second guess it since the answer is usually a number which gives a nice number when ou square root it

Reply 195

blues123

2

and for the tangent to circle question in the from px +qy +r = 0 what did everyone get ?

Reply 196

money-for-all

17

Oh my dayzzzzz , how hard was that paper !!!

I got some massive phatt number over 12

oh my dayzzzzz fam

oh my dayzzzzzzzzzzzzzz

Reply 197

timtjtim

2

Original post by moe889

how do you work out coordinate of q

The tangent was at (-2,24). From that you could get the gradient, with the dy/dx, and a bit of y-y = m(x-x) gives you the equation of the line. Plug in y = 0 to that, and you get x = -5/4