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# AQA Maths Core 1+2 May 2013 Watch

1. (Original post by nholliday95)
For Core 1, for question 2)a)ii) the question asked x√12 = 7√3 - √48

Did anybody else get 3/√4 as the value for X, or have I messed up? Thanks
x√12= 7√3-√48
x√12=7√3- 4√3
x√12=3√3
√12 = √4 x √3 = 2√3
x(2√3) = 3√3
x= 3/2. (1.5)
2. (Original post by Alifff)
for x i got 3/2
Oh yeah I just thought, 3/2 is exactly the same. Hopefully I won't get penalised for not turning the root 4 into 2.
3. A) Show p=3/2

72=p96+q
24=p24+q

48=p72

48/72= 2/3

B) find u3

72= 2/3*96 +q
72=64 + q
Q=8

u3= 2/3*72 +q
U3= 48 +q

u3= 48 + 8
= 56

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4. For the second translation did anyone get Root((x-2)^3)+0.7)

I thought the -2 had to be cubed with the x, and the -0.3 taken off the 1? But still in the root because its not actually with the x?

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5. (Original post by nholliday95)
Oh yeah I just thought, 3/2 is exactly the same. Hopefully I won't get penalised for not turning the root 4 into 2.
haha its only one mark if that does happen and i think the grade boundaries would be lower as the paper was semi hard according to c1 standards
6. What was the proof for trig question at the end? I couldnt for the life of me do the last 2 parts on Q9
7. Did a resit of C1, paper wasn't too bad
Can't remember the questions though.
-Area question i got 27 for the final part.
-x was 3/2 for the second question
-the circle translation question. i put translation 6 to the right and 7 down, so (6,-7) in the square brackets (not too sure about this being correct)
there was a question, express AB as 1/4√10
Overall fairly confident i got over 95%, hoping for 100.
8. For Q1, p was -3, k = 10, D = (-7, -4).
For the surds question, x = 1.5 and for part b the answer they were looking for was 8 - (15)^0.5.
The complete the square question was 2(x+1.5)^2 + 0.5 and the length of AB was 0.5(10)^0.5.
Dividing the polynomial by x+3 gave x^2 - 3x + 5.
The integral was 31.5 or 63/2 and the area of the shaded region was 27.
The point furthest away from the x-axis was (5, -14) and the translation was by vector (6, -7).
The last question was 20/7 ( < or =) k (< or =) 4.
9. (Original post by nholliday95)
For Core 1, for question 2)a)ii) the question asked x√12 = 7√3 - √48

Did anybody else get 3/√4 as the value for X, or have I messed up? Thanks
Nah, I got (√33)/2
10. (Original post by Equality4all)
The last question was 20/7 ( < or =) k (< or =) 4.
You only had to find the value of k not solve the inequality.

The answer was k = (-20)/7 and k= 4
11. Also, for question 5)b)ii), it asked you to use the coordinates that we got from part a)ii) (-3,-13) or something I think,
and find a minimum value putting it into 1/2√n

any done that one? And did you get 1/2√100?
12. (Original post by Notorious544d)
Same here, I was getting scared hearing 116 everywhere!

Can anybody remember the question and the u1 and u2 values?

Edit: I derived the u1 and u2 values by using u3 as 56 and I think u1 was 96 and u2 was 72.
I put in 3/2 instead of 2/3 . Such a stupid mistake to make! How many marks will I lose? The question was just a two marker right?

*sigh*
13. (Original post by Science211)
You only had to find the value of k not solve the inequality.

The answer was k = (-20)/7 and k= 4
No it was not. It was a real roots question, so it asked you to solve the inequality to find the possible values for k. In addition, it was 20/7, not -20/7.
14. For the 2 to the power of k question, I actually got k = 2? Did anyone else get that?
15. (Original post by MajesticHippo)
For the 2 to the power of k question, I actually got k = 2? Did anyone else get that?
I think it was 6/5
16. (Original post by Alifff)
I got those too
I think people didnt realise that it was a trapezium.
Area of that was (6+33)*3/2 ?

Fairly sure that trapezium's aren't covered for Core 1. Pretty sure that they're introduced at Core 2.
17. (Original post by PatrickM)
Fairly sure that trapezium's aren't covered for Core 1. Pretty sure that they're introduced at Core 2.
Nah I thought that too until I did a past paper this morning before the exam and it came up, yet I still used the area of a triangle like on this paper annoyingly
18. In C1:

was it

(X-5)^2 + (Y+7)^2 = 49 >>>>>>>> (X+1)^2 + Y^2 = 49?

or other way round?

i got (-6 , 7)
19. (Original post by MajesticHippo)
For the 2 to the power of k question, I actually got k = 2? Did anyone else get that?
Ye I got that too K=2
20. (Original post by PatrickM)
Fairly sure that trapezium's aren't covered for Core 1. Pretty sure that they're introduced at Core 2.
The question in Core 1 involved using the area of a trapezium in the integration, but it wasn't a "trapezium rule" integration question(which is in Core 2, if I remember right) .

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