n^5 n^3 = n^(5 + 3) = n^8You can check it with 2:2^5 2^3 = 2^(5 + 3) = 2^8 = 2562^5 = 322^3 = 832 * 8 = 256We are right!
(n^5)(n^3)= n^5+3= n^8
You answer is n^8