Multiple Choice

Sum of the coefficients of $$ (1+x)^n $$ is always a

Aan integer
Correct Answer
Bpositive integer
Correct Answer
Cnegative integer
Dzero

Solution

To determine the sum of coefficients, we substitute $$x=1$$ in the above expression.
Thus sum of coefficients
$$=(1+1)^{n}$$
$$=2^{n}$$
Hence, its a positive integer.

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