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lg5乘lg8000怎么算

答: lg5×lg8000 =lg5×(lg1000+lg8) =lg5×(3+3lg2) =3×lg5×(1+lg2)

lg5乘lg8000加(lg2的根号3的方)乘(lg2的根号3的方)除以lg600减0.5lg0.36 =lg5*(3+3lg2)+(3lg²2)/(lg600-lg0.6) =lg5*(3+3lg2)+lg²2 =3lg5+3lg5lg2+lg²2

原式=lg5(3lg2+3)+3lg22+1=3lg2(lg5+lg2)+3lg5+1=3(lg2+lg5)+1=4.故答案为:4.

lg5×lg8000+(lg2^√3)²+e分之ln1一(8分之1)负的2分之1次方 =lg5×(3+3lg2)+(√3×lg2)²+0-2√2 =3lg5+3lg5lg2+3lg²2-2√2 =3lg5+3lg2(lg5+lg2)-2√2 =3lg5+3lg2-2√2 =3-2√2

lg5*lg8000=lg5*lg(1000*2^3)=lg1000+lg5+3lg2=3+lg10+2lg2=4+2lg2 lg2^根号3=根号3*lg2,再平方等于3(lg2)^2 所以原式等于4+2lg2+3(lg2)^2

1).lg5=lg10/2=lg10-lg2=1-lg2;lg8=lg2^3=3lg2;lg8000=lg8+lg1000=3lg2+lg10^3=3lg2+3=3(1+lg2);lg0.06-lg6=lg0.06/6=lg0.01=lg10^(-2)=-2。2).原式=(1-lg2)3(1+lg2)+3lg2-2=3[1-(lg2)^2]+3lg2-2=1+3lg2-3(lg2)^2=1+3x0.301-3x0.301^2=1.631。

lg5*lg8000+(lg2^根号3)^2+lg0.06-lg6 =lg5*(lg8+lg1000)+(√3*lg2)^2+lg(6/100)-lg6 =lg5*(3lg2+3)+3*(lg2)^2+lg[(6/100)/6] =3lg2*lg5+3lg5+3(lg2)^2+lg(1/100) =3lg2(lg2+lg5)+3lg5+lg10^(-2) =3lg2*lg10+3*lg5-2 =3lg2+3lg5-2 =3(lg2+lg5)-...

[lg5*lg8000+(lg2^根三)^2]/(lg600-1/2lg0.036-1/2lg0.1) =[(lg5*(lg8+3)+(√3*lg2)^2]/[lg6+2-1/2lg(0.036*0.1)] =[3lg5*lg2+3lg5+3*(lg2)^2]/[lg6+2-lg√(0.0036)] =[3lg2(lg5+lg2)+3lg5]/[lg6+2-lg0.06] =(3lg2+3lg5)/[lg(6/0.06)+2] =3(lg5+lg...

(1)tan405°-sin450°+cos750°+sin240°=tan(360°+45°)-sin(360°+90°)+cos(720°+30°)+sin(180°+60°)…(1分)=tan 45°-sin 90°+cos 30°-sin60°…(3分)=1-1+32-32…(5分)=0.…(6分)(2)分子=lg5(3+3lg2)+3(lg2)2=3lg5+3lg2(lg5+l...

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