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Question
Evaluate: 10! – 6!
Solution
10! – 6! = 10 × 9 × 8 × 7 × 6! – 6!
= 6!(5040 – 1)
= 6 × 5 × 4 × 3 × 2 × 1 × 5039
= 3628080
∴ 10! – 6! = 3628080
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