Edexcel Exam Questions (higher) help pls

1) x = 2p, y = 2q
(a) Express in terms of x and/or y,
(i) 2p + q
....................................
(ii) 2^2q
.....................................
(iii) 2p–1
....................................
(3 marks)

2) (a) Show that (2a – 1)^2– (2b – 1)^2 = 4(a – b)(a + b – 1) (3 marks)

(b) Prove that the difference between the squares of any two odd numbers is a multiple of 8.
(You may assume that any odd number can be written in the form 2r – 1, where r is an integer). (3 marks)

3) Bill invests £500 on 1st January 2004 at a a compound interest of R% per annum. The Value, £V, of this investment after n years is given by the formula V= 500 x (1.045)^n
a) Write down the value of R (1 mark)
b) Use your calculator to find the value of Bill's investment after 20 years
(2 marks)

4) rationalise the denominator of 1 divided by 8 square root 8
give your answer in the form square root 2 divided by p
where p is a positive integer

5) solve this quadratic equation x^2 - 5x - 8 = 0
answers in 3 sig fig

6) Two prisms, A and B are mathematically similar. The volume of prism A is 12000cm^3. The volume of prism B is 49152cm^3. The total surface area of prism B is 9728cm^2. Calculate the surface area of prism A

Reply 1

tushar_1

OP

4

CAN ANY 1 PLEASE DO SOME OF THESE QUESTIONS?, they are all past calculator paper questions from edexcel, that i need 2 check my answers are correct with...so dont just ignore this when u read it, do them, for ur practice, and it may help..please, thanks

Reply 2

Chezua

12

bleh, i'll be a samaritan just for today :p:

1a) i- x + y/2 (right? :confused:

)
ii- 2^y
iii- x - 1

2) damn, i can't be bothered to type all of em. basically you expand the brackets in each side and pretend that they're normal equations that equal to each other. try and keep similar values in one side =P

hah, i don't wanna be a smaritan anymore :s-smilie:

dude, i think most of them's in the textbook anyway. the questions look as if they CAN be solved by using the methods in the book. the last one you gotta learn a formula i think.

ta!

Reply 3

Chezua

12

CAN ANY 1 PLEASE DO SOME OF THESE QUESTIONS?, they are all past calculator paper questions from edexcel, that i need 2 check my answers are correct with...so dont just ignore this when u read it, do them, for ur practice, and it may help..please, thanks

chill, besides you posted this in the wrong forum >_>

Reply 4

Papaya

1a) (i) = xy. That's the only one I know from that section, lol

Reply 5

Chezua

12

no it can't :confused:

xy means X MULTIPLIED by Y.
the question says PLUS.
so if 2p is X, and q is Y/2, it becomes X + Y/2

:p:

Reply 6

Papaya

They mean:
x = 2^p
y = 2^q

I have that exam paper in front of me :smile:

Reply 7

Papaya

i) 2^p+q
ii) 2^2q
iii) 2^p-1

Reply 8

Chezua

12

OH i see. so it's not x = 2p, y = 2q.

damn, i'm sorry, my brain's not working very well. tho i'm sure if you post this thread in the 'academic help' forum, loads of ppl will flood in to help ya.

Reply 9

kadhumia_flo

10

2a)

Reply 10

kadhumia_flo

10

2b)

8r-8 is is a multiple of 8

Reply 11

-=Ky=-

3) Bill invests £500 on 1st January 2004 at a a compound interest of R% per annum. The Value, £V, of this investment after n years is given by the formula V= 500 x (1.045)^n
a) Write down the value of R (1 mark)
b) Use your calculator to find the value of Bill's investment after 20 years
(2 marks)

3a) 500 x (1.045)^n .... 1.045 represents the percentage increase, 0.045 is how much it increases by there for he recieves 4.5 percent intrest a year

3b) 500 x(1.045)^20... you do the working out :smile:

Reply 12

tushar_1

OP

4

ok thanks, 4 tryin ppl :smile:

Edexcel Exam Questions (higher) help pls

Related discussions

Articles for you