2(lg根号2)^2+1/2lg2*lg5+根号下(lg根号2-1)^2=?
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2(lg根号2)^2+1/2lg2*lg5+根号下(lg根号2-1)^2=?
2(lg根号2)^2+1/2lg2*lg5+根号下(lg根号2-1)^2=?
2(lg根号2)^2+1/2lg2*lg5+根号下(lg根号2-1)^2=?
2(lg根号2)^2+1/2lg2*lg5+根号下(lg根号2-1)^2
=2(lg根号下2)^2+1/2*lg2*lg5+根号下[(lg根号下2)^2-2*lg根号2+1]
=2(1/2*lg2)^2+1/2*lg2*lg5+根号下[(1/2*lg2)^2-lg2+1]
=2(1/2*lg2)^2+1/2*lg2*lg5+根号下[(1-1/2*lg2)^2]
=2(1/2*lg2)^2+1/2*lg2*lg5+(1-1/2*lg2)
=1/2*(lg2)^2+1/2*lg2*lg5-1/2lg2+1
=1/2*(lg2)^2+1/2*lg2*(lg5-1)+1
=1/2*(lg2)^2+1/2*lg2*(-lg2)+1
=1/2*(lg2)^2-1/2*(lg2)^2+1
=1
2(lg根号2)^2+1/2lg2*lg5+根号下(lg根号2-1)^2=2*(1/2lg2)²+1/2lg2*lg5+√(lg√2-1)²=
1/2(lg2)²+1/2lg2*lg5+lg√2-1=1/2lg2(lg2+lg5)+1/2lg2-1=1/2lg2+1/2lg2-1=lg2-1
2(lg根号下2)^2+lg根号下2*lg5+根号下[(lg根号下2)^2-lg2+1]
2(lg根号2)平方+lg根号2*lg5+根号[(lg根号2)平方-lg2+1]
1.2(lg根号2)平方+lg根号2*lg5+根号下【(lg根号2)平方-lg2+1】
这四个数哪个大?lg2 /lg根号2/(lg2)平方/lg(lg2)
(lg根号下27+lg8-lg根号下1000)/(1/2lg0.3+lg2)
(lg根号27+lg8-3lg根号10)/lg3+2lg2-1
求化简 2(lg根号2)的方+lg根号2乘以lg根号5+根号下((lg根号2)方-lg2+1)
1.2(lg根号2)的平方+lg根号2乘以lg根号5+根号下((lg根号2)平方-lg2+1)
2(lg√2)^2 +lg√2*lg5+(√(lg√2)^2-lg2+1)(lg√2)^2-lg2+1都是要开根号的·~
1/2lg(x-3)+lg根号4x+1=lg2+1/2lg3
1/2lg25+lg2+lg根号10+lg(0.01)负1次方要过程
设lg2=a lg3=b 那么lg根号下1.8等于多少1/2lg(32/49)-4/3lg根号8+lg根号245
(lg^2)^2+lg^2*lg^50+lg^25=?(lg2)^2+lg2*lg50+lg25=?
(lg²2-lg2*lg5+lg²)+3lg2*lg5
lg^2 5+lg2*lg5+lg2=?
2lg 5+lg2*lg50=1
lg^1/2为什么=-lg2 .
2(lg根号2)^2+1/2lg2*lg5+根号下(lg根号2-1)^2=?