Question

Convert in to factorial 1.3.5.7..... (2n-1)

Answer 1

1.3.5.7.9....(2n-1)= 1.2.3.4.5....(2n-1)(2n) / (2.4.6.8.10.....2n)

                        = 2n factorial / 2 *( 1.2.3.4.....n)

                        = 2n factorial / 2* n factorial

Answer 2

The answer is

=(2n)!/2(n)!