Badiuddin askIITians.ismu Expert
Last Activity: 14 Years ago
Dear manan
concept of sum of coefficient is very simple.
if you expand any polynomial then you will get coefficient term multiplied by x ,so if i put x=1 then only coefficient term will remain.
so sum of coefficient is easly find by just putting x=1 in any expansion
in this case put x=1
(1+1-3*1)2143
=-1
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