Dividing factorials
dividing factorials is easy because each factorial may have other factorials inside it as factors. For example:
10!/8!
= 10*9*(8*7*6*5*4*3*2*1) / (8*7*6*5*4*3*2*1)
= 10*9 / 1
= 90
dividing factorials is easy because each factorial may have other factorials inside it as factors. For example:
10!/8!
= 10*9*(8*7*6*5*4*3*2*1) / (8*7*6*5*4*3*2*1)
= 10*9 / 1
= 90