Evaluate   (i) 8 !   (ii) 4 ! - 3 !

Solution:

Using the definition of factorial,
(i) 8! = 8×7×6×5×4×3×2×1 = 40,320
(ii) 4 ! - 3 ! = 4×3×2×1 - 3×2×1 = 24 - 6 = 18

NCERT Solutions Class 11 Maths Chapter 7 Exercise 7.2 Question 1

Evaluate (i) 8 ! (ii) 4 ! - 3 !

Summary:

Using the concept of factorial notations, (i) 8! = 40,320, (ii) 4! - 3! = 18