Question

Qualquer que seja o natural n, $(2^{n+1}+2^{n})(3^{n+1}-3^{n}):6$é igual a?

Answer 1

 

 $f(n) = 6^n$

$(2^{n+1} + 2^n).(3^{n+1} - 3^n) / 6 = 6^n$