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](/uploads/image/z/4069061-53-1.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%9A4.25%5Ex%3D1000%2C0.00425%5Ey%3D1000%2C%E6%B1%821%2Fx-1%2Fy)
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~~~