(lg2)^2 lg5×lg20-1
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(lg2)^2 lg5×lg20-1
(lg2)^2 lg5×lg20-1
(lg2)^2 lg5×lg20-1
(lg2)^2+lg5×lg20-1
=(lg2)^2+lg5×(lg2+lg10)-1
=(lg2)^2+lg5×(lg2+1)-1
=(lg2)^2+lg5×lg2+lg5-1
=lg2×(lg2+lg5)+lg5-1
=lg2×1+lg5-1
=lg2+lg5-1
=1-1
=0
(lg2)^2 lg5×lg20-1
(lg2)^2+lg5*lg20
(lg2)^2+lg20*lg5
(lg2)^2+lg5·lg20-1=?
lg2*lg50+lg5*lg20-2lg5*lg2
lg5·lg20+(lg2)^2
lg5^2+lg4+lg5*lg20+(lg2)^2
(lg2)^2+lg20*lg5+(lg5)^2
为什么lg5*lg20=lg5*(1+lg2)
lg5^2+lg4+lg5*lg20+(lg2)^@
(lg2)*(lg2)+lg5*lg20-1怎么计算
lg2+lg5=?1-lg2=?1-lg5=?2lg5+2/3lg8+lg5*lg20+(lg2)2=?
(1) lg5+lg20+(lg2)^2 (2)2^3+log2^5
问道对数题 lg2*lg50+lg20*lg5-2lg5*lg2
lg5*lg20+(lg2)^
lg5*lg20=?为什么lg5*lg20=lg5(1+lg2)=lg5+lg5lg2?明了明了
lg2*lg2+lg20*lg5=?
lg20乘lg5的计算lg20乘lg5为什么等于(1+lg2)*(1-lg2)