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AQA Maths Core 1+2 May 2013

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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)

Reply 81

nholliday95

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.

Reply 82

solosdk

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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Reply 83

Hart1995

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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Reply 84

username1086199

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

Reply 85

What was the proof for trig question at the end? I couldnt for the life of me do the last 2 parts on Q9 :frown:

Reply 86

$oulja

Did a resit of C1, paper wasn't too bad
Can't remember the questions though. :frown:

-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.

Reply 87

Equality4all

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.

(edited 10 years ago)

Reply 88

Science211

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

Reply 89

Science211

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

Reply 90

nholliday95

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?

Reply 91

ash9002

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 :frown:

. Such a stupid mistake to make! How many marks will I lose? The question was just a two marker right?

*sigh*

Reply 92

Equality4all

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.

(edited 10 years ago)

Reply 93

MajesticHippo

For the 2 to the power of k question, I actually got k = 2? Did anyone else get that?

Reply 94

The H

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

Reply 95

PatrickM

Original post by Alifff

I got those too :smile:

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.

Reply 96

nholliday95

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

Reply 97

K FIZZLE

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)

Reply 98

dannyb2012

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 :frown:

K=2

Reply 99

AunShah

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) .