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Question
Write in terms of factorial.
6 × 7 × 8 × 9
Solution
6 × 7 × 8 × 9
= `(1 xx 2 xx 3 xx 4 xx 5 xx 6 xx 7 xx 8 xx 9)/(1 xx 2 xx 3 xx 4 xx 5)`
= `(9!)/(5!)`
∴ 6 × 7 × 8 × 9 = `(9!)/(5!)`
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