已知：4.25^x=1000,0.00425^y=1000,求1/x-1/y
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已知：4.25^x=1000,0.00425^y=1000,求1/x-1/y已知：4.25^x=1000,0.00425^y=1000,求1/x-1/y已知：4.25^x=1000,0.00425^y
已知：4.25^x=1000,0.00425^y=1000,求1/x-1/y
已知：4.25^x=1000,0.00425^y=1000,求1/x-1/y
已知：4.25^x=1000,0.00425^y=1000,求1/x-1/y
4.25^x=1000,0.00425^y=1000 得：
4.25=1000^(1/x),0.00425=1000^(1/y)
4.25/0.00425=1000^(1/x-1/y)=1000
所以1/x-1/y=1
是初2的题吗，我怎么看怎么像是大2的题啊？？？晕，现在的中学生真悲惨~~~