How many terms are in the expansion of $(a + b)^{n}$ where $n$ is a positive integer?
A$2n$
B$n + 1$
C$n - 1$
D$n$
Answer & Solution
Correct answer: B. $n + 1$
Expansion has $n + 1$ terms. Example: $(a+b)^{2}$ has 3 terms.
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