Tentukan nilai dari bentuk berikut. a. 7! b. 3!+4! c. 3! x

a. 5040, b. 30, c. 144, d. 840

Pembahasan

a. 7! = 7 × 6 × 5 × 4 × 3 × 2 × 1 = 5040
b. 3! + 4! = (3 × 2 × 1) + (4 × 3 × 2 × 1) = 6 + 24 = 30
c. 3! × 4! = (3 × 2 × 1) × (4 × 3 × 2 × 1) = 6 × 24 = 144
d. 8! / (2!4!) = (8 × 7 × 6 × 5 × 4 × 3 × 2 × 1) / ((2 × 1) × (4 × 3 × 2 × 1)) = 40320 / (2 × 24) = 40320 / 48 = 840