由已知得 25=2000^(1/x) ,80=2000^(1/y) ,
因此 25*80=2000^(1/x)*2000^(1/y)=2000^(1/x+1/y) ,
所以 2000^(1/x+1/y)=25*80=2000=2000^1 ,
那么 1/x+1/y=1 .
整式乘除和幂的运算25^x=2000,80^y=2000,求1/x+1/y的值
整式乘除和幂的运算25^x=2000,80^y=2000,求1/x+1/y的值
数学人气:584 ℃时间:2020-07-30 23:46:33
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