求y=(x-3)/(x+3)的值域
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求y=(x-3)/(x+3)的值域
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![求y=(x-3)/(x+3)的值域](/uploads/image/z/20049542-62-2.jpg?t=%E6%B1%82y%3D%28x-3%29%2F%28x%2B3%29%E7%9A%84%E5%80%BC%E5%9F%9F)
y=(x-3)/(x+3)
=(x+3-6)/(x+3)
=1-6/(x+3)
因为6/(x+3)≠0
所以y≠1
y=(x-3)/(x+3)的值域为{y/y≠1}
=(x+3-6)/(x+3)
=1-6/(x+3)
因为6/(x+3)≠0
所以y≠1
y=(x-3)/(x+3)的值域为{y/y≠1}