Same chapter3 marksDifficulty: Medium
Find the coefficient of x5 in the expansion of (2 + x)8.
Binomial Theorem
3 marksDifficulty: Medium
Find the sum of the binomial coefficients in the expansion of (1 + x)n.
Original Khojo Papers practice question — not from a past board paper.
Answer
2n
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Putting x = 1 in the expansion makes every power of x equal to 1, so the sum of the coefficients is (1 + 1)n = 2n.
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