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manan bhavsar Grade: 12
        the sum of the coefficients of the polynomial 

(1+x-3x^2)^2143 is
Respected sir Please reply me the basic concepts of the sum of coefficients in Binom. expan.
6 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

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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Badiuddin

6 years ago
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