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प्रश्न
Find the value of 4! + 5!
उत्तर
4! +5! = (4 × 3 × 2 × 1) + (5 × 4 × 3 × 2 × 1)
= (4 × 3 × 2 × 1) × (1 + 5)
= 24 × 6
= 144
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