(1)lg5+1g20= (2)lg200-1g2=
3个回答
(1)lg5+1g20=lg(5*20)=1g100=2
(2)lg200-1g2=lg(200/2)=lg100=2
相关问题
对数计算(1g2)²+1g5·lg20
(lgx)^2+(lg2+1g3)1gx+lg2*lg3=0
1.计算:(lg2)2+lg5·lg20-1
(lg2)^2+lg5lg20-1
(lg2)^2+lg5·lg20-1=?
lg20乘lg5的计算lg20乘lg5为什么等于(1+lg2)*(1-lg2)
为什么lg5*lg20=lg5*(1+lg2)
1、lg5^2+2/3lg8+lg5lg20+(lg2)^2
(lg2)*(lg2)+lg5*lg20-1怎么计算
(1)求值: lg 5 2 + 2 3 lg8+lg5•lg20+(lg2 ) 2