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![[Post New]](/templates/default/images/icon_minipost_new.gif) 17 Oct 2007 11:02:01 IST
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Put x=1,y=1,z=1 to find the sum of coefficients.
(1-2+3)n = 128
2n = 27
n = 7
If n is odd the greatest coefficient in expansion of (1+x)n is nC(n-1)/2
Greatest coefficient = 7C3
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Bipin Kumar Dubey
Chemical Dept.
IIT Kharagpur
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