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AQA A2 Mathematics MPC3 Core 3 - Wednesday 15th June 2016 [Official Thread]

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Original post by medic1010101
Did anybody actually answer Q9 tho?😂


Yes, just not the first part...but my answers looked way to simple :/
Original post by C0balt
Answers I remember

Area of OAB= (e^2+1)^2/e^3
Volume=pi(-(ln3)^2 + 2ln3 + 4)
p root q=-root5

Range f(x) =<24ln2 - 8 (iirc)
gg(x) =x

Some *****y fraction somebody Posted for substitution


Attached for show that secx+tanx=0.2

Posted from TSR Mobile

for the range, 24ln2 is the same as 8ln8 right?
Original post by RUNSran
for the range, 24ln2 is the same as 8ln8 right?


Yep
Original post by RUNSran
for the range, 24ln2 is the same as 8ln8 right?


Yeah it is


Posted from TSR Mobile
You can do 9a in three lines, using sec^2-tan^2=1 then completing the square and using the value they gave
Original post by RUNSran
for the range, 24ln2 is the same as 8ln8 right?


got the same as you incept for the area one.
Original post by RUNSran
for the range, 24ln2 is the same as 8ln8 right?


yes
Guys what were the questions? trying to remeber to get rough marks
Q1 - three differentiations (out of 6)
Q2 - Simpsons, itteration, and the alpha change in sign thing (out of ??)
Q3 - x^2<5x-6 (out of 5)
Q4 - Translate y=e^2x-5 (out of ??)
Q5 - Find the range of f(x) and gg(x) (out of 7)
Q6- The ln(3x) rotation thing (out of ??)
Q7- ??
Q8- U=4x-1 substiution (out of 7)
Q9- Secx-tanx (out of 8)
ok so that was a difficult core 3 paper. I didnt struggle too much though!

these were my answers

1. differentiation

2. numerical methods =1.51

3. 1<<x>>2 x>>3

4. stretch in x factor 1/2 flowed by translation (2.5,0)
4b. i got point A(2e^-2+2,0) B(0,e+e^-1) line of intersection as y-e^-1=-e(x-2)/2 (couldnt put into form they wanted)

5. f(x)<<1/2 ln(8) and gg(x)=x

6. pi(4-ln(9)-(ln(3))^2)

7. 3rt5/5

8. 117/244

9. cos(x)=-5/13
9b. -32.4, -21.3

i probally made some silly mistakes but im confident on most
(edited 7 years ago)
Reply 429
Avatar for Fudge2
Fudge2
5
That was solid. Think I did ok but question 9 and the prootq thing I couldn't do. 1.51 for the x^x estimate anyone?
(edited 7 years ago)
Original post by mypretendname
Guys what were the questions? trying to remeber to get rough marks
Q1 - three differentiations (out of 6)
Q2 - Simpsons, itteration, and the alpha change in sign thing (out of ??)
Q3 - x^2<5x-6 (out of 5)
Q4 - Translate y=e^2x-5 (out of ??)
Q5 - Find the range of f(x) and gg(x) (out of 7)
Q6- The ln(3x) rotation thing (out of ??)
Q7- ??
Q8- U=4x-1 substiution (out of 7)
Q9- Secx-tanx (out of 8)


You've missed out the solving modulus Q4 I think


Posted from TSR Mobile
What did people get for estimate X^x, i got around 2.27 but my calculator gave me 1.5 something...

Apart from that, dropped 6 marks on 9a, the triangle, couldn't simplify it to the form, and ggx cus im a retard. Hoping for 65 plus now to get around 95 ums, and hope I get 90ish c4.
Original post by Fudge2
That was solid. Think I did ok but question 9 and the prootq thing I couldn't do. 1.51 for the x^x estimate anyone?


I had 1.51
Original post by Busted838
ok so that was a difficult core 3 paper. I didnt struggle too much though!

these were my answers

1. differentiation

2. numerical methods =1.51

3. 1<<x>>2 x>>3

4. stretch in x factor 1/2 flowed by translation (2.5,0)
4b. i got point A(2e^-2+2,0) B(0,e+e^-1) line of intersection as y-e^-1=-e(x-2)/2 (couldnt put into form they wanted)

5. f(x)<<1/2 ln(8) and gg(x)=x

6. pi(4-ln(9)-(ln(3))^2)

7. 3rt5/3

8. 117/244

9. cos(x)=-5/13
9b. -32.4, -21.3

i probally made some silly mistakes but im confident on most


One of your trig values is wrong, or mine :frown:, -21.3 and -88.7 i had -root5, gg(x)=1 and some other conflicting answers that i cba to type
Original post by Busted838
ok so that was a difficult core 3 paper. I didnt struggle too much though!

these were my answers

1. differentiation

2. numerical methods =1.51

3. 1<<x>>2 x>>3

4. stretch in x factor 1/2 flowed by translation (2.5,0)
4b. i got point A(2e^-2+2,0) B(0,e+e^-1) line of intersection as y-e^-1=-e(x-2)/2

5. f(x)<<1/2 ln(8) and gg(x)=x

6. pi(4-ln(9)-(ln(3))^2)

7. 3rt5/3

8. 117/244

9. cos(x)=-5/13
9b. -32.4, -21.3

i probally made some silly mistakes but im confident on most


I agree with 2,4,6,8,9, the rest I can't remember , -sqrt5 at some point
(edited 7 years ago)
Reply 435
Avatar for Fudge2
Fudge2
5
Original post by ThusSpakeAlex
I had 1.51


Awesome
I sat the test today and took a look at the past grade boundaries / 100 UMS. I reckon the grade boundaries will be something along the lines of

100 UMS - 70 (maybe 69)
A* - 62
A - 55
B - 51
C - 46
D - 41
E - 36
(edited 7 years ago)
Original post by Busted838
ok so that was a difficult core 3 paper. I didnt struggle too much though!

these were my answers

1. differentiation

2. numerical methods =1.51

3. 1<<x>>2 x>>3

4. stretch in x factor 1/2 flowed by translation (2.5,0)
4b. i got point A(2e^-2+2,0) B(0,e+e^-1) line of intersection as y-e^-1=-e(x-2)/2 (couldnt put into form they wanted)

5. f(x)<<1/2 ln(8) and gg(x)=x

6. pi(4-ln(9)-(ln(3))^2)

7. 3rt5/5

8. 117/244

9. cos(x)=-5/13
9b. -32.4, -21.3

i probally made some silly mistakes but im confident on most

cosx was -2/5.2
Original post by ThusSpakeAlex
One of your trig values is wrong, or mine :frown:, -21.3 and -88.7 i had


I got -21.3 and -88.7 too, how did you get 3 root 5 /3
Original post by RUNSran
cosx was -2/5.2


It simplifies.

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