Re: Maths doubt

Posted by Noel on Apr 13, 2014; 8:21am
URL: http://discussion-forum.276.s1.nabble.com/Maths-doubt-tp7586601p7586765.html

Q. The coefficient of x^2 in the polynomial
(1-x)*(1+2x)*(1-3x)...(1+14x)*(1-15x) is
a -121
b -191
c -255
d -291