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(2008•乌鲁木齐)先化简,再求值:,其中x=-1.
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(2008•乌鲁木齐)先化简,再求值:
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHQAAAAqCAYAAABiHn+gAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
,其中x=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC0SURBVDhPzZNNDsAQEIXnXBaOY+8m1g5i6yBd
zFFe/bY0pGpViUTEN+/NA2EwiAhLcwaP9p979HOYLWTNQfvL7IJtDy0tOCFhHYpU/h1mLmAW9PoL
3CbqNeib7Vsx3f0OnEqU4KTNCbz3/HgIbCWoBEhwqjxFdV9BsDcdTd/knEvnjCAIc2Q7U5hh5Sjt
5CCrd3BUaj5Kk1ffswqHovpcuW+ma+4wAiTMHhzrRvUt5WpqFT4BvDKYovKwNAUAAAAASUVORK5C
YII=
)
-1.
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(2008•乌鲁木齐)2008年5月12日14时28分在我国四川省汶川地区发生了里氏8.0级强烈地震,灾情牵动全国人民的心,“一方有难、八方支援”.某厂计划加工1500顶帐篷支援灾区人民,在加工了300顶帐篷后,由于救灾需要工作效率提高到原来的1.5倍,结果提前4天完成了任务.求原来每天加工多少顶帐篷?
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(2008•乌鲁木齐)2008年5月12日14时28分在我国四川省汶川地区发生了里氏8.0级强烈地震,灾情牵动全国人民的心,“一方有难、八方支援”.某厂计划加工1500顶帐篷支援灾区人民,在加工了300顶帐篷后,由于救灾需要工作效率提高到原来的1.5倍,结果提前4天完成了任务.求原来每天加工多少顶帐篷?
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(2008•乌鲁木齐)2008年5月12日14时28分在我国四川省汶川地区发生了里氏8.0级强烈地震,灾情牵动全国人民的心,“一方有难、八方支援”.某厂计划加工1500顶帐篷支援灾区人民,在加工了300顶帐篷后,由于救灾需要工作效率提高到原来的1.5倍,结果提前4天完成了任务.求原来每天加工多少顶帐篷?
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(2008•乌鲁木齐)先化简,再求值:
,其中x=
-1.
-
(2008•乌鲁木齐)
的相反数是( )
A.-![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
C.-![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEvSURBVEhL1VTJDcQgDHRdPCgnfzrhTSF8KSQP
SvFicnCZAFpFq0WKRNAwjMcHILMAAGc+ugo9Au6cxf4JgVPJE+UK0WMPvEF5XaJ9MFgaf5MMCbxz
mOCI3kgEae6zIUFjMoXzDQEpWAqhVOBQZa8fhWS30+EtGROM4pZTCsscBAJrbcRqASj0HvdUxvUi
6VUGD+wNjEoOFQ1BMC6PG8P/RVY8tYWXSUVOENPWNFcKpSDYtUAQmg2h11xNsKSC82CaoGfiEkEP
zJ0HtXPTh8OVaVx5NsPyJbdA9hJBPoGq5qnFcUWfJlBoHUUmc01wMjUEowk0VlAjKJwVBe19YNv4
wj1nIZ/IndQ+EHg0sp1A0x44JTEb/93SYhU04yubQEMFTnHN1Q/lpVL+fTMtKPgAkZz+NHVpDlkA
AAAASUVORK5CYII=
)
D.
-
(2008•乌鲁木齐)
的相反数是( )
A.-![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
C.-![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEvSURBVEhL1VTJDcQgDHRdPCgnfzrhTSF8KSQP
SvFicnCZAFpFq0WKRNAwjMcHILMAAGc+ugo9Au6cxf4JgVPJE+UK0WMPvEF5XaJ9MFgaf5MMCbxz
mOCI3kgEae6zIUFjMoXzDQEpWAqhVOBQZa8fhWS30+EtGROM4pZTCsscBAJrbcRqASj0HvdUxvUi
6VUGD+wNjEoOFQ1BMC6PG8P/RVY8tYWXSUVOENPWNFcKpSDYtUAQmg2h11xNsKSC82CaoGfiEkEP
zJ0HtXPTh8OVaVx5NsPyJbdA9hJBPoGq5qnFcUWfJlBoHUUmc01wMjUEowk0VlAjKJwVBe19YNv4
wj1nIZ/IndQ+EHg0sp1A0x44JTEb/93SYhU04yubQEMFTnHN1Q/lpVL+fTMtKPgAkZz+NHVpDlkA
AAAASUVORK5CYII=
)
D.
-
(2008•乌鲁木齐)
的相反数是( )
A.-![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
C.-![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAkCAYAAACAGLraAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEvSURBVEhL1VTJDcQgDHRdPCgnfzrhTSF8KSQP
SvFicnCZAFpFq0WKRNAwjMcHILMAAGc+ugo9Au6cxf4JgVPJE+UK0WMPvEF5XaJ9MFgaf5MMCbxz
mOCI3kgEae6zIUFjMoXzDQEpWAqhVOBQZa8fhWS30+EtGROM4pZTCsscBAJrbcRqASj0HvdUxvUi
6VUGD+wNjEoOFQ1BMC6PG8P/RVY8tYWXSUVOENPWNFcKpSDYtUAQmg2h11xNsKSC82CaoGfiEkEP
zJ0HtXPTh8OVaVx5NsPyJbdA9hJBPoGq5qnFcUWfJlBoHUUmc01wMjUEowk0VlAjKJwVBe19YNv4
wj1nIZ/IndQ+EHg0sp1A0x44JTEb/93SYhU04yubQEMFTnHN1Q/lpVL+fTMtKPgAkZz+NHVpDlkA
AAAASUVORK5CYII=
)
D.