1 . n C 1 + 2, n C 2 + 3 . n C 3 + ....+ n. n C n is equal to

Mathematics · JEE Advanced · NTA Exams — Binomial Theorem And Its Simple Applications

1. \(\frac{\mathrm{n}(\mathrm{n}+1)}{4} \cdot 2^{\mathrm{n}}\)
2. 2ⁿ⁺¹–3
3. n2^n–1
4. none of these

Answer

(C) n2 n–1

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