To simplify the given expression:
5^2𝑥+1 + 2.5^2𝑥-1 / 2.5^2𝑥
First, we can rewrite 2.5 as 5/2:
5^2𝑥+1 + (5/2)^2𝑥-1 / (5/2)^2𝑥
Now we can use the properties of exponents to simplify:
(5^(2𝑥) * 5^1 + 5^(2𝑥) * (5/2)^(-1)) / (5/2)^(2𝑥)
(5^(2𝑥+1) + 5^(2𝑥) * (2/5)^(1)) / (5/2)^(2𝑥)
(5^(2𝑥+1) + 5^(2𝑥) * 2/(5^2)) / (5/2)^(2𝑥)
(5^(2𝑥+1) + 5^(2𝑥) * 2/25) / (5/2)^(2𝑥)
Now we can simplify further if needed, but this is the fully simplified form of the expression.