alleryIn each term of the expansion, what is equal to the index of the binomial?
ASpan of the indices
BSum of the indices
CSign of the indices
DSize of the indices
Answer & Solution
Correct answer: B. Sum of the indices
1. Each term carries a power of a and a power of b.
2. Those two powers are related to the whole index.
3. In each term, the sum of the indices of a and b is equal to the index of a plus b.
4. So the answer is the sum of the indices.
_Source: syllabus Mathematics, Ch 7 'Binomial Theorem'_
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