Question

1-3
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☆ 7! - 4!
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nb : pke cra -.​

Answer 1

7! - 4!= (7 × 6 × 5 × 4 × 3 × 2 × 1) - (4 × 3 × 2 × 1)= (42 × 5 × 4 × 3 × 2 × 1) - (12 × 2 × 1)= (210 × 4 × 3 × 2 × 1) - (24 × 1)= (840 × 3 × 2 × 1) - 24= (2.520 × 2 × 1) - 24= (5.040 × 1) - 24= 5.040 - 24= 5.016