Question

calcule (A) 4! +3!=.... (B) 7! sobre 5!...(C)A6,2......(D)C10,3

Answer 1

a) 4! + 3! = 4×3×2×1 + 3×2×1 = 24 + 6 = 30
b) 7!/5! = 7*6*5! / 5! = 7*6 = 42
c) A6,2 = 6! / (6-2)! = 6! / 4! = 6*5*4! / 4! = 6*5 = 30
d) C10,3 = 10! / 3! (10-3)! = 10! / 3!7! = 10*9*8*7! / 3!7! = 10*9*8 / 3*2 = 720 / 6 = 120