MCQ
(n+1)C1 + (n+1)C2 + (n+1)C3 +…..+ (n+1)Cn =
- A2(2n+1)
- B2(2n−1)
- C2n+1
- D(2n+1 - 1)
✓
Answer
- 2(2n−1)
Solution
As in the hint required expression + n+1C0 + n+1Cn+1 = 2n+1
⇒ required. expression = 2n+1 − 2 = 2(2n−1)
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