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下列命题中,正确的是A.若a>b,c>d,则ac>bcB.若ac>bc,则a<bC.若,则...
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下列命题中,正确的是( )
A.若a>b,c>d,则ac>bc
B.若ac>bc,则a<b
C.若
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACkAAAAqCAYAAAAu9HJYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
,则a<b
D.若a>b,c>d,则a-c>b-d
相关试题
-
下列命题中,正确的是( )
A.若a>b,c>d,则ac>bc
B.若ac>bc,则a<b
C.若
,则a<b
D.若a>b,c>d,则a-c>b-d
-
下列命题中,正确的是( )
A.若a>b,c>d,则ac>bc
B.若ac>bc,则a<b
C.若
,则a<b
D.若a>b,c>d,则a-c>b-d
-
下列命题中,正确的是( )
A.若a>b,c>d,则ac>bc
B.若ac>bc,则a<b
C.若
,则a<b
D.若a>b,c>d,则a-c>b-d
-
下列命题中,正确的是( )
A.若a>b,c>d,则ac>bc
B.若ac>bc,则a<b
C.若
,则a<b
D.若a>b,c>d,则a-c>b-d
-
下列哪个命题的逆命题为真( )
A.若a>b,则ac>bc
B.若|x-3|>1,则2<x<4
C.若a2>b2,则a>b>0
D.若|x2-3|>1,则
-
若a>b,c∈R,则下列命题中成立的是( )
A.ac>bc
B.
>1
C.ac2≥bc2
D.
-
若a>b,c∈R,则下列命题中成立的是( )
A.ac>bc
B.
>1
C.ac2≥bc2
D.
-
PA垂直于以AB为直径的圆所在的平面,C为圆上异于A、B的任一点,则下列关系不正确的是.
A.PA⊥BC
B.BC⊥平面PAC
C.AC⊥PB
D.PC⊥BC
-
已知D是△ABC所在平面内一点,
=![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAALhJREFU
OE/NU8sVwzAIIyuzDpswB1OwBMWftJgSJ6e++uTnCCGQcpgf2J0G2B14BlA2BGitDEiWGmcQI2TT
/ux3B0UMmOr8OAqFMiASClUtPpUXGgLFFIs8FPUd5TGV0eAtugC4ykVHYlBjzFO0inNJaQelhqzp
oRcbx+4ZosB8/7XI7sG5sG8vYqrWmceYvu4UxWj3MGjQk6eyYphvLY8AaCEvF4EJ/YpVr4JrwI5B
KGuIv92fJuoF8SbYAZs1OEAAAAAASUVORK5CYII=
)
+![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAMhJREFU
OE+9ktERxCAIRLmWbYdOrIMqbIIDDQbUY/KROWfykWRZnrAflgPZUUF24JmAUNuMp1Rurgq4VS5I
1ydiVNF8F75GFCpaLcFlZ9B23mGFJAR2/zk6BJ5R6gSNa0E2XHOeAsLC1d/vUnSBkvu+LKD2Dgo1
h2TDgrvVw1EnC3nBYQe8oZdBnUFeYDDjnoNDqq4WkqQlanFZbvYrqjjomu1qybq1ciwurn27ZofN
Mik+AfgwKBHkqV4ZNMkzSTHy/17Wr1h+ATWw10memLcaAAAAAElFTkSuQmCC
)
,则( )
A.BD=
BC
B.BD=
BC
C.BD=
BC
D.BD=
BC
-
设a,b,c∈R,且a>b,则( )
A.ac>bc
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAjCAYAAADmOUiuAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAWdJREFU
WEftl1sOBBEQRc2WbcdOrMMqbMIor3gMyqDbB5nOJB2tjntL4aN0Iyc3ADy5kZPhjLsFoOSKEqq4
fAAdESsFFAzyUT8PACJj/bBYKPYEoDGoH+sCtjP5Kji70q+CbQVtyWrtBaMKmsJpB4WHif8s7IPp
cZGxlm51KLDBOS8B3AHm5zEFuBNsCvAJsADog2H+8/QZBcXEyMecsjiaZaecDK6MqPsSwJ2gSwGx
oIK5WosotFsAMaCSU9RGsBWwnnlSccr0cbXf3gGEbQ5hb3FpCrlB9OzgzoAcpK9D2sPaCwcFl4uU
q9odzSkIkuvOAch+vIfPxQIRwr2kHssAGuUSGhhk082usNcC18Qg9tiTJSy8a8g+amncv1y97TMh
gQ9ocku3M0rfzSAleMXqhfitXCepvT5xwV6p9G9ty+w1cLl7WURnsT9Fg9Ux5Fq+kO9+9SJW4Tt1
cGDeF3BArJ9dj1fwC5cO+7X3m5fkAAAAAElFTkSuQmCC
)
C.a2>b2
D.a3>b3