Question

решите уравнения log2(3-x)=0

Answer 1

$log_{2}(3-x)=0\\ left { {{3-x=2^0} atop {3-x>0}} right.\\ left { {{3-x=1} atop {x<3}} right.\\ left { {{x=2} atop {x<3}} right. \\x=2$