1.lg²5+lg2×lg5+lg2 2.(lg2)³ +(lg 5)³ +3lg 2×lg 5 3.7 的lg20次方×4.lg500+lg8/5-1/2lg64+50(lg2+lg5)²1.lg²5+lg2×lg5+lg2 2.(lg2)³ +(lg 5)³ +3lg 2×lg 53.7 的lg20次方×(1/2)的lg0.7次方
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1.lg²5+lg2×lg5+lg2 2.(lg2)³ +(lg 5)³ +3lg 2×lg 5 3.7 的lg20次方×
4.lg500+lg8/5-1/2lg64+50(lg2+lg5)²
1.lg²5+lg2×lg5+lg2
2.(lg2)³ +(lg 5)³ +3lg 2×lg 5
3.7 的lg20次方×(1/2)的lg0.7次方
1.lg²5+lg2×lg5+lg2
=lg5(lg5+lg2)+lg2
=lg5*lg(5*2)+lg2
=lg5+lg2
=1
2.(lg2)³ +(lg 5)³ +3lg 2×lg 5
=(lg2+lg5)(lg²2-lg2*lg5+lg²5)+3lg 2×lg 5
=lg²2+2lg2*lg5+lg²5
=(lg2+lg5)²
=1
3.7 的lg20次方×(1/2)的lg0.7次方
=7 的(lg2*10)次方×(1/2)的(lg7*0.1)次方
=7 ^(1+lg2)×(1/2)^(-1+lg7)
=7*2*7^lg2*(1/2)^lg7
=14*7^lg2/2^lg7
4.lg500+lg8/5-1/2lg64+50(lg2+lg5)²
=lg500+lg8/5-lg8+50
=lg(500*8/5/8)+50
=lg100+50
=52
1.lg²5+lg2×lg5+lg2 2.(lg2)³ +(lg 5)³ +3lg 2×lg 5 3.7 的lg20次方×4.lg500+lg8/5-1/2lg64+50(lg2+lg5)²1.lg²5+lg2×lg5+lg2 2.(lg2)³ +(lg 5)³ +3lg 2×lg 53.7 的lg20次方×(1/2)的lg0.7次方
lg²5+lg2+lg2*lg5?
lg²5+lg2×lg5+lg2
lg^2 5+lg2*lg5+lg2=?
lg^2 5+lg5*lg2+lg2 怎么算lg^2 5+lg5*lg2+lg2 怎么算
lg5×lg(5×2)+lg2怎莫算具体
lg^2(5)+lg2+lg2乘lg5等于多少?
lg2×lg5=?lg2×lg5=lg?求问号..是lg(2+5)吗?
lg²2+lg2×lg5+lg²5
lg²2+lg2×lg5+lg²5=?
(lg²2-lg2*lg5+lg²)+3lg2*lg5
lg2+lg5-lg根号10
lg²2+lg2×lg5+lg5
(lg^2)2+lg2*lg5+lg5
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
lg^2 5+lg2*lg5+lg20=计算
求值 :lg5²+lg2*lg50+(lg2)²答案写;2lg5+lg2*lg(5*10)+(lg2)²①=2lg5+lg2*lg5+lg2+(lg2)² ②=2lg5+lg2*(lg5+lg2)+lg2③ .第 ②步怎么得到的怎么就变成了lg2*lg5+lg2?
2lg²2+lg²5+3lg2lg5-lg2