2lg5+lg20=?lg5*lg20=?
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2lg5+lg20=?lg5*lg20=?2lg5+lg20=?lg5*lg20=?2lg5+lg20=?lg5*lg20=?lg5+2lg5+1lg5^22/3lg8lg5*lg20(lg2)^2=
2lg5+lg20=?lg5*lg20=?
2lg5+lg20=?lg5*lg20=?
2lg5+lg20=?lg5*lg20=?
lg5+2
lg5+1
lg5^2 2/3lg8 lg5*lg20 (lg2)^2 =2lg5 2/3lg2^3 lg5*lg(4*5) (lg2)^2 =2lg5 2lg2 (lg5)^2 lj5*2lg2 )lg2)^2 =2(lg2 lg
2lg5+lg20=?lg5*lg20=?
为什么lg5*lg20=lg5*(1+lg2)
lg2lg50+lg5×lg20-lg100×lg5×lg2=
(lg2)^2+lg5·lg20-1=?
lg2*lg2+lg20*lg5=?
lg5^2+lg8^2/3+lg5*lg20+(lg2)^2=?
lg4+lg5.lg20+(lg5)2
lg4+lg5.lg20+(lg5)2
(lg2)^2+lg5*lg20
(lg2)^2+lg20*lg5
lg20+lg5
lg5*lg20=?为什么lg5*lg20=lg5(1+lg2)=lg5+lg5lg2?明了明了
(lg2)²+lg5×lg20+5=?
(lg5)²+lg5·lg20+1g4=?
lg5^2+lg4+lg5*lg20+(lg2)^2
(lg2)^2+lg20*lg5+(lg5)^2
lg5^2+lg4+lg5*lg20+(lg2)^@
lg2*lg50+lg5*lg20-2lg5*lg2