The sum of the coefficients of the polynomial $\left(1+x-3 x^{2}\right)^{2163}$ is …. .
$(1982,2 \mathrm{M})$
Correct Answer: 12. $(-1)$
Solution:
i.e. $\quad(1+1-3)^{2163}=-1$
Thus, sum of the coefficients of the polynomial $\left(1+x-3 x^{2}\right)^{2163}$ is $-1$ .
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