Ex 8.1, 14 - Prove 3r nCr = 4n - Chapter 8 Class 11 - Ex 8.1

  1. Chapter 8 Class 11 Binomial Theorem
  2. Serial order wise
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Ex8.1, 14(Method 2) Introduction For r = 0, 3^0 nC0 For r = 1, 3^1 nC1 For r = 2, 3^2 nC2 For r = 3, 3^3 nC3 … …. For r = n, 3^𝑛 nCn Ex8.1, 14(Method 2) Taking L.H.S Ex 8.1,14 (Method 1) By Binomial Theorem, Putting b = 3 and a = 1 in the above equation, we obtain

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