题目内容
化简下列各式:
(1)2log525+3log264;
(2)2log510+log50.25;
(3)log2(log216).
答案:
解析:
解析:
|
解:(1)∵2log525=2log552=4log55=4,3log264=3log226=18log22=18,∴2log525+3log264=4+18=22. (2)∵2log510=log5100,∴2log510+log50.25=log5100+log50.25=log5(100×0.25)=log525=log552=2. (3)∵log216=log224=4,∴log2(log216)=log24=log222=2. |
练习册系列答案
相关题目