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Ex 7.2, 1 - Evaluate (i) 8! (ii) 4! - 3! - Chapter 7 Class 11 - Factorial

  1. Chapter 7 Class 11 Permutations and Combinations
  2. Serial order wise
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Ex 7.2, 1(Method 1) Evaluate Ex 7.2, 1 (i) 8! = 1 × 2 × 3 × 4 × 5 × 6 × 7 × 8 = 40320 (ii) 4! – 3! 4! – 3! = 1 × 2 × 3 × 4 – 3 × 2 × 1 = 24 – 6 = 18 Ex7.2, 1 (Method 2) Evaluate (ii) 4! – 3! 4! – 3! = 4 × 3! – 3! = 3! (4 – 1) = 3! × 3 = 3 × 2 × 1 × 3 = 18 Ex 7.2, 1 Evaluate 8! 8! = 1 × 2 × 3 × 4 × 5 × 6 × 7 × 8 = 40320

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