Question

Решите 1 логарифм
log3x-log9x+log81x=3

Answer 1

Log3 x-1/2Log3 x+1/4Log3x=3;
Log3(x:x^1/2•x^1/4)=Log3 27;
x^3/4=3^3
x^3=3^12;
x=3^4
x=81