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In the expansion of a bracket raised to four, the sum of indices is:
AFive
BThree
CEight
DFour
Answer & Solution
Correct answer: D. Four
1. The sum is the same in every term.
2. It equals the index of the bracket.
3. The sum is four.
_Source: NCERT Class 11 Mathematics, Ch 7 'Binomial Theorem'_
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