lg5+lg2-(4/9)负的1/2次幂等于

问题描述:

lg5+lg2-(4/9)负的1/2次幂等于

lg5+lg2-(4/9)负的1/2次幂
=lg5*2-(9/4)^(1/2)
=1-(3/2)^[2*(1/2)]
=1-3/2
=-1/2
^表示次幂