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Question
Write in terms of factorial:
6 × 7 × 8 × 9
Solution
6 × 7 × 8 × 9 = 9 × 8 × 7 × 6
Multiplying and dividing by 5!, we get
= `(9xx8xx7xx6xx5!)/(5!)`
= `(9xx8xx7xx6xx5xx4xx3xx2xx1)/(5!)`
= `(9!)/(5!)`
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