对数式2log5_10 +log5_0.25的值_数学解答

对数式2log5_10 +log5_0.25的值

人气：214 ℃　时间：2020-01-27 00:56:17

解答

2log5^10+log5^0.25
=2lg10/lg5+lg0.25/lg5
=lg100/lg5+lg0.25/lg5
=(lg100+lg0.25)/lg5
=lg25/lg5
=2lg5/lg5
=2