In the expansion of (1-x)to the power 2n-1 find the coefficient of x to the power r-1 and x to the power 2n-r?

Asked by SHRUTI GUPTA | 19th Oct, 2013, 05:37: PM

Expert Answer:

Coefficient of xr-1 in (1-x)2n-1
= (-1)r-1. 2n-1Cr-1
 
Coefficient of x2n-r in (1-x)2n-1
= (-1)2n-r2n-1C2n-r

Answered by  | 20th Oct, 2013, 07:10: PM

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