2.simplfy √２０/５＋３√(１/５)
更新1:
3. smplify √320
rationalization of denominators分母有理化 and addition of surds?
回答 (1)
2015-12-09 2:02 pm
3. √320=√(2⁶×5)=2³×√5=8√5
1. √(3/320)=√3/√320=√3/(8√5)=(√3×√5)/(8√5×√5)=√15/40
2. √20/5+3√(1/5)=√(2²×5)/5+3(√1×√5)/(√5×√5)=2√5/5+3√5/5=√5
1. √(3/320)=√3/√320=√3/(8√5)=(√3×√5)/(8√5×√5)=√15/40
2. √20/5+3√(1/5)=√(2²×5)/5+3(√1×√5)/(√5×√5)=2√5/5+3√5/5=√5
收錄日期: 2021-04-18 14:08:33
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