Final answer:
The number of terms in a binomial expansion is (n + 1), where n is the exponent of the binomial being expanded.
Step-by-step explanation:
The question refers to the number of terms in a binomial expansion. According to the Binomial Theorem, the expansion of (a + b)^n will have (n + 1) terms. This is because when you expand a binomial, the terms start with the exponent n on a and decrease to 0, while the exponent on b starts at 0 and increases to n. Each term in the expansion has a combined exponent of n, leading to a total of (n + 1) terms in the expansion. To determine the exact number of terms, one must know the value of the exponent n.