Mathematics: Post your doubts here!

[krishnapatelzz]

thnx. bt hw did u knw hw 2 do that? sry fr the bother

by practicing pastpapers

 

[Thought blocker]

thnx. bt hw did u knw hw 2 do that? sry fr the bother

It is given in question itself.
They said, by using factor theorem and part(i). This is the key for the answer.

 

[Thought blocker]

by practicing pastpapers

Acha xD

 

[krishnapatelzz]

https://www.facebook.com/groups/mathsrevision.examsolutions/ post doubts here for fast replies , and help others too

 

[justskedaddle]

How to do 5(ii) (b) . 9709_s13_qp_13

 

[krishnapatelzz]

View attachment 62033
How to do 5(ii) (b) . 9709_s13_qp_13

https://www.8mundo.com/post/mathematics-9709-paper-1-working-solutions-for-past-papers-6553003 you have solved papers here

 

[krishnapatelzz]

https://www.8mundo.com/post/mathematics-9709-paper-1-working-solutions-for-past-papers-6553003 this is helpful for everyone who are taking 9709 P1 , these are solved papers from 2003 to 2013

 

[Saly Elkady]

How to solve that?

 

[Thought blocker]

How to solve that?

Using binomial theorem

 

[Saly Elkady]

Using binomial theorem

Yeah I know that but I want the working because I'm not getting the answer right

 

[Thought blocker]

Yeah I know that but I want the working because I'm not getting the answer right

n = 6 and coffecient is twewnty one over four???
i did this in hurry :V

 

[Saly Elkady]

n = 6 and coffecient is twewnty one over four???
i did this in hurry :V

Show your working please

 

[Thought blocker]

I am not able to upload pic.

Show your working please

But here is how u can do...
Open mf9 see the binomial formula..
expand the power of n bracket till x squared term
then multiply that expansion with the other bracket
compare the coff of x and equate it to 7, using it u will get n = 6
then substitiue that value to get coff of x square

 

[Thought blocker]

use this formula

 

[Saly Elkady]

I am not able to upload pic.

But here is how u can do...
Open mf9 see the binomial formula..
expand the power of n bracket till x squared term
then multiply that expansion with the other bracket
compare the coff of x and equate it to 7, using it u will get n = 6
then substitiue that value to get coff of x square

thanks

 

[Thought blocker]

thanks

u get it? xD

 

[Saly Elkady]

u get it? xD

Honestly no xD
I used tried using this formula ( Tr+1= (ncr) ( a) ^n-r X (b)^r )since it's easier than expanding and confusing myself so ya

 

[Thought blocker]

Honestly no xD
I used tried using this formula ( Tr+1= (ncr) ( a) ^n-r X (b)^r )since it's easier than expanding and confusing myself so ya

Y u even using that formula? That will complicate the thing.
Use the other formula which is very simple to use in this case..
I will explain u.. dw

first of all expand till x squared term and reply me once u do it.

 

[Thought blocker]

So much of time in this small expansion???

 

[Saly Elkady]

Nope Internet problems anyway
Now what next?