这道题怎么写?谢谢

2025-01-20 07:22:08
推荐回答(4个)
回答1:

结果如下图所示,望采纳

回答2:

2(lg√2)^2
=2[ (1/2)lg2]^2
=(1/2)(lg2)^2
lg√2.lg5
=(1/2)lg2.lg5
√[ (lg √2)^2 -2lg√2 +1 ]

=√(1-lg √2)^2
=1-lg√2
=1-(1/2)lg2
//
2(lg√2)^2 +lg√2.lg5 +√[ (lg √2)^2 -2lg√2 +1 ]
=(1/2)(lg2)^2 +(1/2)lg2.lg5 +1-(1/2)lg2
=(1/2)(lg2)( lg2 -1) +(1/2)lg2.lg5 +1
=-(1/2)(lg2)( lg5) +(1/2)lg2.lg5 +1
=1

回答3:

解答详见下图

回答4:

未完待续