[(s/a+s/b)/2]/[(s/a-s/b)/2]怎么化简[（s/a+s/b）/2]/[（s/a-s/b）/2]怎么化简

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[(s/a+s/b)/2]/[(s/a-s/b)/2]怎么化简[（s/a+s/b）/2]/[（s/a-s/b）/2]怎么化简
[(s/a+s/b)/2]/[(s/a-s/b)/2]怎么化简
[（s/a+s/b）/2]/[（s/a-s/b）/2]怎么化简

[(s/a+s/b)/2]/[(s/a-s/b)/2]怎么化简[（s/a+s/b）/2]/[（s/a-s/b）/2]怎么化简
原式=（s/a+s/b）/（s/a-s/b）=（a+b）s/(b-a)s=(a+b）/(b-a)

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