7^(X-2)=3^(2-x) помогите решить
7^(x - 2) = (1/3)^(x - 2) | : (1/3)^(x -2) 21^(x -2) = 0 21^(x -2) = 21^0 x - 2 = 0 x = 2
21^0=1, а не 0