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(2008•无锡)函数y=中自变量x的取值范围是________;函数y=中自变量x的取值...
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(2008•无锡)函数y=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABcAAAAjCAYAAAB/wZEbAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEYSURBVEhL7ZXRDYMwDEQ9WXbKOlnGo2QUg2kc
kuJgRylSP0DqBwier2fHB/TgBQ+y6Q/gGAkAPr+QKDv/rq08JwoRCw4pcoF6f1/FhGfETmlOwa3e
hF+0sUW/Uv4NxwjkZE9OS+e/3dUJWzKlEElaa6PJrxxjoOSdwVLZpZwnpPN5b6rHdxPODawHSA4S
+Owx4R5vR++8cNWZvVdaw9afcbXXc93zlTmu3/JCg+t6WPe8RuAT8EM+x58Gl8o1eEtOTgTxGH5U
5l3NlRl8LiV9aZUz0K/JgfLSlSN4ndvuOgQjW+RN7viUFW0JA467cm2cfKN6A5ekqcnuTJqz8ADO
iytIOMrkeDKstbNZfu2n64foxrcXrpqzAfGop3WXU9CvAAAAAElFTkSuQmCC
)
中自变量x的取值范围是________;函数y=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACUAAAASCAYAAADc4RcWAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAExSURBVEhL7ZQxEoQgDEVzLguOY5+TrDUHsc1B
LDhKlgiIKGp0nNVinbFQQvx5/wtw5QIAfvTeElV7/6t38BelRK0jRZgzZiw7ZXN9mWNrgJHCjmNR
zrJJ1UyM8hNMz/rP7lU6a8ah1aIcUUFmbHAnLT80WjpJajmiWJlGSrZOIiNJtWhvG0ocztq3EEWY
MYclaWjYOhGE3uBwSd3mWReHIpR9qccJ+wpNRb7ySshEFqRKmqeco3mZlGzc+LCIVVu2T9J4dMB9
GzG304CCfR2lhHrNgTwpA9vrx+QWpPq+H/d0DXDTDeGcWIgSe4pTYIY+rU1ZK2w5lpNzWcvUSCzQ
mouqBxb5E4MsuGOyA/FLZ9hOplrfVGjV7NPOfEddEZ6haxia7l2iZEqh9SpSCf3Tor6s0wZPmC8H
NwAAAABJRU5ErkJggg==
)
中自变量x的取值范围是________.
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