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Last updated at May 29, 2018 by Teachoo
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Example 5 Evaluate (i) 5! 5! = 1 2 3 4 5 = 120 (ii) 7! 7! = 1 2 3 4 5 6 7 = 5040 (iii) 7 ! 5! 7 ! 5! = 5040 120 = 4920.
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