The sequence is 1, 5/2, 25/4......
Lets take it like this
x, 5/2 x , 25/4x.....
We have to find : ratio of 3rd to 1st
i.e (25/4 x)/ (x)
St 1. X is not zero.
Required cuz if x=0, then the ratio is not defined (Division by zero is not defined)
For all other values of x, Ratio is 25/4
St 2-> Doesnt matter if x is div by 2 or not. Odd or even, the ratio will always be 25/4.
A it is.