(lg2-lg5)/(2lg2-lg5)=?取lg2=0.3 为什么上式=(1-2lg2)/(1-3lg2)?
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(lg5)²+lg2×lg5+lg2
lg5+2lg2+(lg2)=?
lg2(2lg2+2lg5)+2lg5 咋算?
如何将(lg2)²+(2lg2+lg5)×lg5变成(lg2)2+2lg2lg5+(lg5)²
lg5+lg5*lg2+lg2*lg2
对数lg2*lg5=?2lg(5)+2/3 lg8+lg5*lg20+lg2 =lg5^2+lg8^(2/3)+lg5*(lg4+lg5)+lg2 =lg100+lg5+2lg2*lg5+lg2 =2+(lg5+lg2) =2+1 =3 第二个等号lg5*(lg4+lg5)为什么=lg5+2lg2*lg5
lg2(1+lg5)+(lg5)^2
计算:(lg5)^2 +lg2 *lg5
(lg5)^2+lg5.lg2=
(lg2)^3+(lg5)^3+3lg2*lg5等于?
(lg5)的二次方+lg2乘以lg5+lg2
2lg2(lg2+lg5)+2lg5得数
(lg2)^2+lg2*lg5+(lg5)^2=
lg2*lg50+lg5*lg20-2lg5*lg2
(lg5)平方+2*lg5*lg2+(lg2)平方
1.(lg5)2次方+lg2*lg50
(lg2)*2+lg2lg5+lg5等于
(lg5)²+lg2×lg50