Question

9 power 2n-4 power 2n is divisible by

Answer 1

Given n is a natural number, then 92n – 42n If n = 1 then 81 - 16 = 65 is always divisible by both 5 and 13. if n = 2 then 6561 - 256 = 6305 is always divisible by both 5 and 13.