若2x=3,4y=5,则2^x-2y=?
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若2x=3,4y=5,则2^x-2y=?
若2x=3,4y=5,则2^x-2y=?
若2x=3,4y=5,则2^x-2y=?
x=3/2
2y=5/2
2^(3/2)-5/2=2√2-5/2
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