根号200=10根号2=14.14根号0.2=根号(2/10)=根号(4/20)=2/根号20=2/4.472=1/2.236 =0.4772
根号200=根号(2*100)=10根号2=14.14根号0.2=根号(20/100)=(1/10)根号(20)=4.472/10=0.4772
14.14,0.1414
