内容正文:
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1.R�-(-1)+|-1|,���Z( )
A.-2 B.2 C.0 D.-1
2.��+ãnOx2-2x=0�’Ì_Q’DZ( )
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A.1 B.2 C.3 D.4
5.Þ°n{’à)?.áZ2,e��ü?.áZ( )
A.槡2 B.槡2 2 C.槡22 D.1
6.̂ QnO xx-1-1=
3
(x-1)(x+2)
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A.x=1 B.x=-1 C.�O D.x=-2
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tan∠DAC’DZ( )
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C. 槡3+ 3 D.槡3 3
8.)*,!△ABC$,AB=AC,D ZBC Ý�d,
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#)’*åÝ,em¿n’&Â�M(( )
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F,�$°±’�#Z( )
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C.槡2 3-3 D.槡2-1
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13.R�:3
槡3
+(槡3-3)0-| 槡- 12|-2-1-cos60°= .
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x-3(x-2)>4,
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5 ≤
x+1烅
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’OpZ .
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E ",EQ]BC‘abdF.ÞAD=8,AB=6,AE=4,e△EBF·J
’&ÂZ .
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1-
1
3
,
2
2×4=
1
2-
1
4
,
2
3×5=
1
3-
1
5
,
……
ºöT¿+$�0,~�h#Q 1
1×3+
1
2×4+
1
3×5+
…+ 1n(n+2)
(n≥
3/nZ³#),���Z .
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3-n3
m2+mn+n2
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m2+2mn+n2.
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