alleryThe value of $\binom{n}{0}+\binom{n}{1}+\cdots+\binom{n}{n}$ is:
A$n!$
B$n^2$
C$2^{n-1}$
D$2^n$
Answer & Solution
Correct answer: D. $2^n$
Putting x=1 in (1+x)ⁿ gives ΣC(n,r) = 2ⁿ.
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