先化简,再求近似值:5根号1/5-5根号4/5+根号45(精确到0.01)

问题描述:

先化简,再求近似值:5根号1/5-5根号4/5+根号45(精确到0.01)

5根号1/5-5根号4/5+根号45
=根号5-根号20+根号45
=根号5-2根号5+3根号5
=2根号5
≈4.47
好用的啦,,,坑顶对

5根号1/5-5根号4/5+根号45
=根号5-根号20+根号45
=根号5-2根号5+3根号5
=2根号5
≈4.47