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(2001•内江)解不等式组:
相关试题
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(2001•内江)解不等式组:
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(2001•内江)解不等式组:
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(2001•内江)已知,如图,AB∥CD,则下列等式中错误的是( )
A.∠1=∠2
B.∠5=∠3
C.∠2+∠3=180°
D.∠2=∠4
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(2001•内江)已知,如图,AB∥CD,则下列等式中错误的是( )
A.∠1=∠2
B.∠5=∠3
C.∠2+∠3=180°
D.∠2=∠4
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(2001•内江)计算:1-a-a(1-a)-a(1-a)2-a(1-a)3-…-a(1-a)2000-[(1-a)2001-3]
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(2001•内江)已知:a>0,x1,x2是方程ax2+bx+c=0的两根且x1<x2,则的值是( )
A.
B.
C.
D.
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(2001•内江)已知α=70°,则∠α的补角是( )
A.20°
B.30°
C.110°
D.130°
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(2001•内江)已知:a>0,x1,x2是方程ax2+bx+c=0的两根且x1<x2,则的值是( )
A.
B.
C.
D.
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(2001•内江)解方程组
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(2001•内江)已知:如图,AB=AC,BD=CE.
求证:AD=AE.