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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.

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.

Grade:12

1 Answers

Badiuddin askIITians.ismu Expert
148 Points
12 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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