Question

please solve this question ​

Answer 1

Answer:

25×5(25)^n-25(25)^n}/{5.5.5.5(5)^2n-25(5)^n}

4.25(25)^n}/{600(5)^2n}=100×(5)2n/600(5)^2n

=100/600=1/6 Ans