Question

please answer this fastly​

Answer 1

Answer:

SOLUTION :-

THIS CAN BE SOLVED AS -

$\sf \: \frac{ {2}^{n} \{1.3.5.7.........(2n - 1) \}}{ n!}$

Multiply and divide with (2×4×6×8.........2n)

$= \sf \: \frac{ {2}^{n} \{1.2.3.4.5.6.7.........(2n - 1).2n \}}{(2.4.6.8...........2n) n!}$

$\sf = \frac{ {2}^{n} \{2n ! \}}{ {2}^{n}(1.2.3.4........n)n! }$

$\sf \: = \frac{2n!}{n! \: .n!}$

$\sf \: = \frac{2n!}{(n!)^{2} }$