A) 7
B) 8
C) ? 1
D) 1
Correct Answer: D
Solution :
In the expression \[{{(1+x-3{{x}^{2}})}^{3148}}\] the sum of coefficients is obtained by putting x = 1. \ Sum of coefficients = \[{{(1+1-{{3.1}^{2}})}^{3148}}\] = \[{{(2-3)}^{3148}}\] = \[{{(-1)}^{3148}}\] = 1.
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