已知X十y=一5,xy=3,求根号 y分之X+根号x分之y的值

2025-03-03 07:27:57
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回答1:

解:∵x+y=5, xy=3
∴ x>0, y>0
√﹙x/y﹚+√﹙y/x﹚=√xy/y+√xy/x
=√xy﹙x+y﹚/xy
=﹙x+y﹚/√xy
=5/√3
=5√3/3