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Binomial expansion (1+x)^n

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Binomial expansion (1+x)^n [#permalink] New post 05 Nov 2012, 07:33
Is there a shortcut to calculate (1+x)^n, where n is greater than or equal 4, apart from binomial expansion? It seems calculating using binomial expansion takes enough time that cannot be accommodated under GMAT constraints. So far, I have seen the use of such terms in calculation of compound interest, though of course they are not absolutely necessary. But it's always useful to be armed when going to war, ain't it?
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Re: Binomial expansion (1+x)^n [#permalink] New post 05 Nov 2012, 07:43
The only other method I know is Pascal's triangle.

http://en.wikipedia.org/wiki/Pascal's_triangle

If you do some practice, upto 10 should not be any prob.
But GMAT questions wont ask this. Everything is solvable within 2 mins.
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Re: Binomial expansion (1+x)^n [#permalink] New post 05 Nov 2012, 10:04
ConnectTheDots wrote:
The only other method I know is Pascal's triangle.

http://en.wikipedia.org/wiki/Pascal's_triangle

If you do some practice, upto 10 should not be any prob.
But GMAT questions wont ask this. Everything is solvable within 2 mins.


I guess I should memorize the coefficients just in case. Thank you.
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You can have anything you want if you want it badly enough. You can be anything you want to be and do anything you set out to accomplish, if you hold to that desire with the singleness of purpose. ~William Adams

Many of life's failures are people who did not realize how close to success they were when they gave up. ~Thomas A. Edison

Wir müssen wissen, Wir werden wissen. (We must know, we will know.) ~Hilbert

Re: Binomial expansion (1+x)^n   [#permalink] 05 Nov 2012, 10:04
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