Question

Calcule:

a) P7=

b) P4=

c) P2 . P5=

d) P10/P8=

e) P7/P5

Answer 1

a) P7= 7! = 7.6! = 7. 720 = 5040

b) P4= 4! = 4.3.2.1 = 24

c) P2 . P5= 2!. 5! = 2. 120 = 240

d) P10/P8= 10.9.8!/8! = 10.9 = 90

e) P7/P5 = 7.6.5!/5! = 7.6 = 42