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# Binomal Expansion watch

1. In the expression of (1 X)^n the coefficient's of x^3 and x^4 are equal . Find the value of n
2. (Original post by JadeG2001)
In the expression of (1 X)^n the coefficient's of x^3 and x^4 are equal . Find the value of n
Tried anything? Any thoughts?
3. (Original post by RDKGames)
Tried anything? Any thoughts?
Tried a few different numbers as N but no success. Also tried googling it cant find anything
4. Wait the expression (1X)^n?
that makes no sense as it would just be X^n
5. (Original post by JadeG2001)
Tried a few different numbers as N but no success. Also tried googling it cant find anything
Just get the general expansion up to the term in terms of . You know the coeffs of and this last term are equal, so make them equal. This gives an equation entirely in terms of for you to solve.
6. (Original post by RDKGames)
Just get the general expansion up to the term in terms of . You know the coeffs of and this last term are equal, so make them equal. This gives an equation entirely in terms of for you to solve.
Okay will try that. Thank you

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