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In the first term of the expansion, the index of a is:
AThe value 0
BThe value 2
CThe value n
DThe value 1
Answer & Solution
Correct answer: C. The value n
1. It falls by one in each later term.
2. It ends at zero in the last term.
3. It starts at n.
_Source: NCERT Class 11 Mathematics, Ch 7 'Binomial Theorem'_
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