(lgx)^2+(lg2+1g3)1gx+lg2*lg3=0
问题描述:
(lgx)^2+(lg2+1g3)1gx+lg2*lg3=0
答
(lgx)^2+(lg2+1g3)1gx+lg2*lg3=0
(lgx+lg2)(1gx+1g3)=0
lgx=-lg2
x=1/2
lgx=-lg3
x=1/3
原方程的解是x=1/2 x=1/3