Question

determinati numarul natural n pentru care are loc :3^n-2=27?

Answer 1

3^(n-2)=27
3^(n-2)=3³
n-2=3
n=3+2
n=5

Answer 2

3^(n-2) = 27 => n-2 = 3 (intrucat 3^3 = 27) => n = 5