√log2x−0.5=log2√x, then x equals
4
16
8
None of these
√log2x−0.5=log2√x(log2x)12=12+12log2xlog2x=14+14(log2x)2+12log2x(log2x)2−2log2x+1=0(log2x−1)2=0log2x=1x=2