△=[(log2m)]-4*2*log2根号m=0[(log2m)]-4*2*(1/2)*log2m=0[(log2m)]-4*log2m=0[(log2m)-4]*log2m=0,(log2m)-4=0,log2m=4,m=2^4=16,log2m=0,m=1,所以m=16或m=1.希望能够帮助你!