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.

Reply 126

Shk

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?

Reply 127

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.

Reply 128

Shk

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

Reply 129

X_IDE_sidf

5

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.

Reply 130

Shk

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

Reply 131

math42

20

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.

Reply 132

jbaten

2

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.

Reply 133

Jopster

Original post by shayefc

can anyone remember the total marks for Q9?

it was 15 marks

Reply 134

AstarAstarA

3

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

Reply 135

AstarAstarA

3

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.