2016 Edexcel C2 Morning exam[discussion thread] Watch

Aristricks
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#121
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#121
Anybody got the mark scheme??
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shayefc
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#122
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#122
can anyone remember the total marks for Q9?
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username2488725
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#123
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#123
(Original post by shayefc)
can anyone remember the total marks for Q9?
I think it was 15?
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jbaten
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#124
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#124
(Original post by mcfatty)
how did we find it all?

like the differentiation question?
not too bad the trig equation caused some problems and the last question apart from that it was decent edexcel having mercy for a change lol.
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Thahid
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#125
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#125
Anyone have an idea of when the models answers will come out?
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jbaten
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#126
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#126
(Original post by jbaten)
not too bad the trig equation caused some problems and the last question apart from that it was decent edexcel having mercy for a change lol.
do you remember the trig question by any chance it was 1-2(pi/4+sinx)=0 or something of the sort
Would appreciate if someone could explain how to go about solving that as I had no clue lol.
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Shk
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#127
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#127
NOT IN ORDER

1. prove that a is 64
show sum to infinity
find the difference between 9th and 10th terms

2. find remainder for (2x+?)
show that (x+2) is a factor
factorise the whole thing

3. expand first 3 values of binomial expansion
find A
find k
calculate B

4. trapezium fill in y value
work out trapezium area
work out other area

5. solve for cos(theta + pi/5) between -pi and +pi
show how equation given equals the rearranged version using sin^2x + cos^x = 1 and find values between 0 and 360

6. logs 2 questions


7. integration, area under the curve

8. find area of sector in terms of x
area question = 1000m^2 prove
perimeter proof
find minimum
prove minimum

9?
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Jopster
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#128
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#128
limits were 0 to 9.
but for the area didn't you have to subtract the area of the triangle from the area obtained using the integral? I think I got something like 24 as the area from the integral and then took away like 17 or something. not exactly sure though.
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Shk
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#129
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#129
(Original post by shayefc)
can anyone remember the total marks for Q9?
2) area of sector in terms of x
3) show y =... (area)
3) show perimeter =...
5) find minimum of P
2) prove it's a minimum
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X_IDE_sidf
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#130
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#130
(Original post by megans98)
Please could someone post/try to remember the questions!
Ok I'll try:

1 Geometric series question, prove a=64 given S_4=175 and workout sum to infinity.

2 Trapezium rule. y=8-2^{x-1} in the interval [0,4] with 4 trapeziums

3 Circle centred at (7,8). Find the equation of it and of a tangent at point (10,13)

4 where f x =6x^3+13x^2-4 find the remainder when divided by (2x+3) then factorise it fully given (x+2) is a factor.

5 Expansion of (2-9x)^4. The using that expand (1+kx)(2-9x)^4 in the form A -232x + Bx^2 given the coefficient of x

6 1-2\sin(\theta - \frac{\pi}{5})=0 solve for \theta
and
4\cos^2 x + 7\sin x - 2 = 0

7 This was \int (3x-x^{\frac{3}{2}}) dx and then find the limits (where it crossed the x axis.

8 Simple find x given 2^{2x+5}-7(2^x)=-1.

9 Find optimum perimeter of a funny shape witch comprised a rectangle, sector and a equilateral triangle, need diagram.
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Shk
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#131
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(Original post by Jopster)
limits were 0 to 9.
but for the area didn't you have to subtract the area of the triangle from the area obtained using the integral? I think I got something like 24 as the area from the integral and then took away like 17 or something. not exactly sure though.
that is what I did
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math42
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#132
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#132
(Original post by Thahid)
Anyone have an idea of when the models answers will come out?
Arsey isn't doing any. He has also asked that nobody else does any, but I mean it's not like he is an official Edexcel representative so I'd probably do solutions if the paper was around. Though many people have offered to do the same.
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jbaten
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#133
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#133
(Original post by AstarAstarA)
-2.19
as long as you used the correct method to solve the question you should be alright BTW you cannot have a final answer of a negative area it isn't logical or sensible maths isn't about regurgitating formula and facts to soolve questions it's about applying what you know to unfamiliar scenarios/contexts it is a beautiful language that enable us to describe the world around us once truly mastered that is.
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Jopster
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#134
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#134
(Original post by shayefc)
can anyone remember the total marks for Q9?
it was 15 marks
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AstarAstarA
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#135
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#135
(Original post by shayefc)
can anyone remember the total marks for Q9?
(2) Area of sector
(3) Show area
(3) prove perimeter
(5) find minimum value of p
(2?) justify, with further differentiation, it's a min
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AstarAstarA
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#136
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#136
(Original post by jbaten)
as long as you used the correct method to solve the question you should be alright BTW you cannot have a final answer of a negative area it isn't logical or sensible maths isn't about regurgitating formula and facts to soolve questions it's about applying what you know to unfamiliar scenarios/contexts it is a beautiful language that enable us to describe the world around us once truly mastered that is.
This wasn't an area, this was the logx
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Cake_Chan
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#137
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(Original post by X_IDE_sidf)
9 Find optimum perimeter of a funny shape witch comprised a rectangle, sector and a equilateral triangle, need diagram.
Name:  bad drawing.PNG
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Here a drawing (i made it in paint) of the diagram.
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marldor
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#138
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#138
Hes on about the log question, which had -2.19 as an answer.
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Hjarv67
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#139
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#139
(Original post by M8ty)
That was so easy😂
Expect grade boundries to be high.
You must be stupid to have not got at least 70+
wow your comment reeks of insecurity...
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X_IDE_sidf
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#140
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#140
(Original post by Cake_Chan)
Name:  bad drawing.PNG
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Size:  1.5 KB
Here a drawing (i made it in paint) of the diagram.
Thankyou,

http://www.thestudentroom.co.uk/show....php?t=4117691
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