Answer:
The answer is 1
This is because 3^n is will be small with respect to 5^n as n tends to infinity because 5 ^n increases more rapidly.
Like 5^3 = 125 ,3^3=27
5^4=625 and 3^4=81
So we can see that value is increasing by large differences.
So we can write (5^n +3^n)÷(5^n -3 ^n) as 5^n÷5^n .This is because value of 3^n will ne negligible wrt 5^n as n tends to infinity. And 5^n÷5^n =1.
