若根号6≈2.449,根号60≈7.746.求①,根号0.6.②,若根号x≈0.7746.求x
问题描述：
若根号6≈2.449,根号60≈7.746.求①,根号0.6.②,若根号x≈0.7746.求x
答
√60=2√15≈7.746
√15≈7.746÷2
√15≈3.873
于是
①√0.6=√(3/5)=√15/5≈3.873/5=0.7746
②由①得
√x≈0.7746=√0.6
x=0.6