Binomial sucks (1 Viewer)

[rama_v]

Can anyone please tell me how to do this question.

(1+x)^2n by expansion

prove

2nC0+2 nC1+2nC2+...+2nC2n= 4^n

the 4^n part is killinh me
how do you miraculously get 2n--> n?? this might be a really stupid question. but im stuck.><

Thank YOU!

let x = 1
then 2²ⁿ = 4ⁿ
from first looks it seems like you should differntiate it then let x = 1

EDIT: what the hell is wrong with this BOS server lately lol, all the timings are off..Laz where r u?

 

[sor_ju]

Can anyone please tell me how to do this question.

(1+x)^2n by expansion

prove

2nC0+2 nC1+2nC2+...+2nC2n= 4^n

the 4^n part is killinh me
how do you miraculously get 2n--> n?? this might be a really stupid question. but im stuck.><

Thank YOU!

 

[sor_ju]

Hehe!

yeah.. heh i just got it.. -__-- i still hate binomials..

thanks

 

[LostAuzzie]

EDIT: what the hell is wrong with this BOS server lately lol, all the timings are off..Laz where r u?

Yes I was wondering how you miraculously answered the question before it was asked

 

[acmilan]

Its been a problem for some time, the admin are aware and are working on it.

 

[haboozin]

let x = 1
then 2²ⁿ = 4ⁿ
from first looks it seems like you should differntiate it then let x = 1

I think because of the name of the thread you are thinking a little too hard haha...

theres no need to differentiate?
the questions already answered....
by letting x = 1

 

[rama_v]

I think because of the name of the thread you are thinking a little too hard haha...

theres no need to differentiate?
the questions already answered....
by letting x = 1

lol ok, yeah ur right...