来自林伟强的问题
化简求值a/(a-b)+b/(a+b)+b^2/(a^2-b^2)当a:b=3:
化简求值a/(a-b)+b/(a+b)+b^2/(a^2-b^2)当a:b=3:
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2020-03-3021:07
化简求值a/(a-b)+b/(a+b)+b^2/(a^2-b^2)当a:b=3:
化简求值a/(a-b)+b/(a+b)+b^2/(a^2-b^2)当a:b=3:
a/(a-b)+b/(a+b)+b²/(a²-b²)=a(a+b)/(a²-b²)+b(a-b)/(a²-b²)+b²/(a²-b²)=(a²+2ab)/(a²-b²)∵a:b=3:1∴a=3ba/(a-b)+b/(a+b)+b²/(a²...