How do you write 35times24times23times 22times 4times3times2times135×24×23×22×4×3×2×1 as a ratio of factorials?

1 Answer
Nov 14, 2015

((35!)(24!)(4!))/((34!)(21!))(35!)(24!)(4!)(34!)(21!) or ((23!)(11!)(8!))/((22!)(10!))(23!)(11!)(8!)(22!)(10!)

Explanation:

35xx24xx23xx22xx4xx3xx2xx135×24×23×22×4×3×2×1

=(35!)/(34!)xx(24!)/(21!)xx(4!)=((35!)(24!)(4!))/((34!)(21!))=35!34!×24!21!×(4!)=(35!)(24!)(4!)(34!)(21!)

or

35xx24xx23xx22xx4xx3xx2xx135×24×23×22×4×3×2×1

=5xx7xx8xx3xx23xx2xx11xx4xx3xx2xx1=5×7×8×3×23×2×11×4×3×2×1

=23xx11xx8xx7xx6xx5xx4xx3xx2xx1=23×11×8×7×6×5×4×3×2×1

=(23!)/(22!)xx(11!)/(10!)xx(8!)=((23!)(11!)(8!))/((22!)(10!))=23!22!×11!10!×(8!)=(23!)(11!)(8!)(22!)(10!)