已知x、y满足y=(根号x^2-16)-(根号16-x^2)/8-2x,求xy的平方根.
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已知x、y满足y=(根号x^2-16)-(根号16-x^2)/8-2x,求xy的平方根.已知x、y满足y=(根号x^2-16)-(根号16-x^2)/8-2x,求xy的平方根.已知x、y满足y=(根号
已知x、y满足y=(根号x^2-16)-(根号16-x^2)/8-2x,求xy的平方根.
已知x、y满足y=(根号x^2-16)-(根号16-x^2)/8-2x,求xy的平方根.
已知x、y满足y=(根号x^2-16)-(根号16-x^2)/8-2x,求xy的平方根.
y=(根号x^2-16)-(根号16-x^2)/(8-2x)
根号下的数>=0,所以x^2-16>=0,16-x^2>=0,所以x=4或-4
然而分母8-2x≠0,即x≠4,所以x=-4
所以y=0,所以根号(xy)=0
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