x^2+y^2+z^2=1,则x+y的范围是___?答案是【负根号2,根号2】 要用到柯西不等式的,x^2+y^2+z^2=1,则x+y的范围是___?答案是【负根号2,根号2】要用到柯西不等式的,当然你不柯西不等式也可以,因为我用它
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![x^2+y^2+z^2=1,则x+y的范围是___?答案是【负根号2,根号2】 要用到柯西不等式的,x^2+y^2+z^2=1,则x+y的范围是___?答案是【负根号2,根号2】要用到柯西不等式的,当然你不柯西不等式也可以,因为我用它](/uploads/image/z/12643758-54-8.jpg?t=x%5E2%2By%5E2%2Bz%5E2%3D1%2C%E5%88%99x%2By%E7%9A%84%E8%8C%83%E5%9B%B4%E6%98%AF___%3F%E7%AD%94%E6%A1%88%E6%98%AF%E3%80%90%E8%B4%9F%E6%A0%B9%E5%8F%B72%2C%E6%A0%B9%E5%8F%B72%E3%80%91+%E8%A6%81%E7%94%A8%E5%88%B0%E6%9F%AF%E8%A5%BF%E4%B8%8D%E7%AD%89%E5%BC%8F%E7%9A%84%2Cx%5E2%2By%5E2%2Bz%5E2%3D1%2C%E5%88%99x%2By%E7%9A%84%E8%8C%83%E5%9B%B4%E6%98%AF___%3F%E7%AD%94%E6%A1%88%E6%98%AF%E3%80%90%E8%B4%9F%E6%A0%B9%E5%8F%B72%2C%E6%A0%B9%E5%8F%B72%E3%80%91%E8%A6%81%E7%94%A8%E5%88%B0%E6%9F%AF%E8%A5%BF%E4%B8%8D%E7%AD%89%E5%BC%8F%E7%9A%84%2C%E5%BD%93%E7%84%B6%E4%BD%A0%E4%B8%8D%E6%9F%AF%E8%A5%BF%E4%B8%8D%E7%AD%89%E5%BC%8F%E4%B9%9F%E5%8F%AF%E4%BB%A5%EF%BC%8C%E5%9B%A0%E4%B8%BA%E6%88%91%E7%94%A8%E5%AE%83)
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