首页
已知a,b,c∈R,则下列推证中正确的是A.a>b⇒am2>bm2B.C.D.
试题详情
已知a,b,c∈R,则下列推证中正确的是( )
A.a>b⇒am
2>bm
2B.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKIAAAAjCAYAAAAXHtFmAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
D.
相关试题
-
已知a,b,c∈R,则下列选项正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAJIAAAAjCAYAAAB/7VNeAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
D.
-
已知a,b,c∈R,则下列选项正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAIfSURBVGhD7ZcJkoQgDEU5GXfyOl7Go3gUhrAo
ssgiifTIq7Gm2uo25Bt+AhMTMqbYhLwi9rYwwZi8ls3c+QavVfa+cvExrd8SexcrX8THtH5J7H0V
/GtlLbmIfXgpk1W3LWieqi1kE4uKJS++ylr//xixYVszwVebshYCR2sdS71Q5/MXCl2JDRV9Cg2A
AFxcbvUiYiEQ/xtiQ/L+No7d60Q4hSC+2MFgkHxY1X6lh2hvr+2v8GxvCkHsDTW05VMHu1qIbVpQ
abuQf1mqFulbCAh9ePcYtIpeclDTNmIC6MRdwc23Cihd5DnxyGtgoy7NxyV3UOu+b1oWOTLl+UQs
0gNNFQrRw36DRzafyJTlg16C2KKD4CV2dNqXrL4HTTmVj7aQ+4MamgqpRTWhGqlJInUlR1V/umo7
sNk4cXSM3EFN/t5ZcOYq4e677rNKrioSk8112gJAiPLmX7SWiIVA3EBs8/8xTQL1xFT/JcHY4Sx2
L0JNPuEUEn+hj9UhEbnRRsIG6ltKiH1eOfBMb0clekKzSvWLwuGuQV4t5P7A1pyPbyEJOwPeV+sB
YeV6gBBGxCcHthylB7WfFvvXmGIT4omtG4jdEjc7ogOUscbgFNv4m006HGc6QhlrIIzY8bkQB8pY
Y6HFTsyFKFDGGgwldnaE6ghlrNE4xHZPYOozUvVRxhoNx7PPyQC38ihjjYURe0LBFJuQKTYhU2wy
hPgD8XtHFAhW7wMAAAAASUVORK5CYII=
)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAJIAAAAjCAYAAAB/7VNeAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAALKSURBVHhe7ZkLkqwgDEVZmXtyO26ml+JSeISP
rSiQaBibevfUWFP22OTDJQHHWAAUgJCAChASUAFCGpV1sZOZ7LLG+54wbEFII/KZrTHGXX8gJKYt
CGlYPnb+q4rEsAUhDQuEBFSAkIAKEBJQYWAhhd37/6G9349VT0jtWDtVpLtJ/szhe2b+xE/eQeLH
3Vj781xI/Ng6CSlxJ8nrMtmXdeSR+iGLdbXLFJ430+LulPEvCOP47pLmUxQL09YjISX4jlGCZ6fv
t7nvBydWqnhTXL4k2LcrcII/T3JUR206Sur+jXL02I9yrHkb4LcgEl0SoCbNeVHgMPq2dzButdKr
8ZvJLjke2gklNtrpUfYdrTg0/TjFSvYO44U2x02lZgU7+daRaCUE+10NIcnSeOqOp31DaimyBPPg
xKHjRylWL4QLIR0qzfb/q8qluMjSmD3xo+97eoCC558IWI5etBOyqykkVhwP/WjFyhISBy+27z4u
2eVcJVp/T+zH4lz+Oz6xufqvPrtgP1CL0E7ijacuVsnYHmYcUj8SbH8etraNWLXE32Mgzi0DQ4k9
r+L6CpI7QmN+V5eHElXJktQGL47+fnjx7iqJM3DebEeRVC/GQn5KsqWBObaDtAGlwFfrfg7cNkzJ
3U+WT2Q2oRdIbLHiEPjxJMl7X3yrE5QV6fMalGKlOPzfGP6E1hYHCkndT0J8SoHNKa5j7jkRzDik
ftwjVENvQ1BZzlX1fcgnTpruLbnOiEUEOnGxFSiAGQNl8q1ABQhpQL7t2VWLxmHhCaGtpS1CvU1D
SEORn0TDJPfRUdrnpdYW7ku2IKSB2J8GAzS5uoeijYu2RvYhpNGhic1by9VnSpxPa3XRQkiDcH41
kLc5TWjs7LTWenEbf4Mf59jWCi9ctcjbGuMFMoQ0CjS56fTU8cVxQvriFkICKkBIQAUICagAIQEF
rP0Hg+goi1rdETcAAAAASUVORK5CYII=
)
D.
-
已知a,b,c∈R,则下列推证中正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKIAAAAjCAYAAAAXHtFmAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
D.
-
已知a,b,c∈R,则下列推证中正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKIAAAAjCAYAAAAXHtFmAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
D.
-
已知a,b,c∈R,则下列推证中正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKIAAAAjCAYAAAAXHtFmAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAOvSURBVHhe7VrtlYQgDKQye7Idm9lSLIUDv0U0
E4jA3mbfuz+3mEyGIQlxjdWPMtAAA6YBDApBGbAqRBVBEwyoEJvYhgogxsF2prPDWMA34EuFWGAf
mnPx6a0xxv0VECLoCxfiZtAF0H/qcNsChjqRv+D1Y/sSQpyQ075AITpDm/i8UWPLa7EFDC/ooZpJ
Whxy0GhfmBDH0R5biU9fQYgtYJDbmQYs0eKQA0n7woR4QDQOXb3SvOBoAYPcJtWyRItDDhntiyHE
0Q6db3Ar9oguL9fHILc9dS3R4pDDR/tiCHFLR+7ab2wXuffPNzG+SXbA0zggjoFt66UHinGRjJ8W
B2qajpX2laQaqjTSwOIh+t4TzbgUBpTElHUcnKlcpODiPUOLg7KHx0b7ShKi9WMU4NqMA91D9gID
TLuJAIaBIjP1exjn4oDHxaEF6YbTRTEV7+m5paKsmCC+DwZYsYC+EoToSeINQnHg3nbvpk7Uh4+B
ssj7HsV5tYpw4TPu2vrUzPwhegQ7j8d9NSTEiYyl/8uZxpOB+NNzczylMKQSdcko3DQSOL7nIixj
dFlbTXuOYr17bszkvuU6cM+fhLj1PsZlpRdL311gc7mbB+bTmjfKEkAaxYMkzgsXnvdT3HOZRnUv
mUFLCHDdjkWIc7D7aXrn7clzYGtftJZm3gYA+gKWIDzI4Hw6jDEhnjLd8VXnVqmWw/vCIS4hyEmI
x55k3i3ZHgwKJFKWS7/BgXjIxElxMWW0SEZkl9xJrHu/vbdWgWAjQr47sRT2LbvdHY6b//vnjPXE
hiUw9j8gn+Q0t9dbaN5hQEnbMIM8pOKE8WSW5i2eJWuiJZ2zvXAsDKPm2uCG5YlhbVnKBxq5hWb2
qFwMGA98nFwcU2I4ZLLoL1cKl+bcDIkoyJzL0XpR8OMZ90OHETGxr2GTvl/3zrfloKzwUJzxoM9C
PIRl+QFnMhdBq8S9fHDXo/w8rbuLlTX4n0/g2jf4nuIoRgmYmI39pirzLtuTw/qAPEjjjGNMG2i/
Nb5h8RgsRgf/zN3KgVTuWbYIy0H7MU/44P9fCvHHdrvdcB9eUFwutu1GocjeYoAa2Ev55Qz+NSNK
sf4VdpCBvVQgvMG/ClGK9y+wAw3speJgDv5ViFLEt24HHNhLhcEd/KsQpZhv3A42sJcKImHwL+Va
7bTNADSwlwqBMfhfXWpGlCK/dTvgwF4qDO7gX4UoxbzayWJAhZhFnz4sxYAKUYpJtZPFgAoxiz59
WIqBP0cOe+P8j5HKAAAAAElFTkSuQmCC
)
D.
-
已知a,b,c∈R,则下列推证中正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKIAAAAjCAYAAAAXHtFmAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
D.
-
已知a,b,c∈R,则下列推证中正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKIAAAAjCAYAAAAXHtFmAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
D.
-
已知a,b,c∈R,则下列推证中正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKIAAAAjCAYAAAAXHtFmAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
D.
-
已知a,b,c∈R,则下列推证中正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKIAAAAjCAYAAAAXHtFmAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAOvSURBVHhe7VrtlYQgDKQye7Idm9lSLIUDv0U0
E4jA3mbfuz+3mEyGIQlxjdWPMtAAA6YBDApBGbAqRBVBEwyoEJvYhgogxsF2prPDWMA34EuFWGAf
mnPx6a0xxv0VECLoCxfiZtAF0H/qcNsChjqRv+D1Y/sSQpyQ075AITpDm/i8UWPLa7EFDC/ooZpJ
Whxy0GhfmBDH0R5biU9fQYgtYJDbmQYs0eKQA0n7woR4QDQOXb3SvOBoAYPcJtWyRItDDhntiyHE
0Q6db3Ar9oguL9fHILc9dS3R4pDDR/tiCHFLR+7ab2wXuffPNzG+SXbA0zggjoFt66UHinGRjJ8W
B2qajpX2laQaqjTSwOIh+t4TzbgUBpTElHUcnKlcpODiPUOLg7KHx0b7ShKi9WMU4NqMA91D9gID
TLuJAIaBIjP1exjn4oDHxaEF6YbTRTEV7+m5paKsmCC+DwZYsYC+EoToSeINQnHg3nbvpk7Uh4+B
ssj7HsV5tYpw4TPu2vrUzPwhegQ7j8d9NSTEiYyl/8uZxpOB+NNzczylMKQSdcko3DQSOL7nIixj
dFlbTXuOYr17bszkvuU6cM+fhLj1PsZlpRdL311gc7mbB+bTmjfKEkAaxYMkzgsXnvdT3HOZRnUv
mUFLCHDdjkWIc7D7aXrn7clzYGtftJZm3gYA+gKWIDzI4Hw6jDEhnjLd8VXnVqmWw/vCIS4hyEmI
x55k3i3ZHgwKJFKWS7/BgXjIxElxMWW0SEZkl9xJrHu/vbdWgWAjQr47sRT2LbvdHY6b//vnjPXE
hiUw9j8gn+Q0t9dbaN5hQEnbMIM8pOKE8WSW5i2eJWuiJZ2zvXAsDKPm2uCG5YlhbVnKBxq5hWb2
qFwMGA98nFwcU2I4ZLLoL1cKl+bcDIkoyJzL0XpR8OMZ90OHETGxr2GTvl/3zrfloKzwUJzxoM9C
PIRl+QFnMhdBq8S9fHDXo/w8rbuLlTX4n0/g2jf4nuIoRgmYmI39pirzLtuTw/qAPEjjjGNMG2i/
Nb5h8RgsRgf/zN3KgVTuWbYIy0H7MU/44P9fCvHHdrvdcB9eUFwutu1GocjeYoAa2Ev55Qz+NSNK
sf4VdpCBvVQgvMG/ClGK9y+wAw3speJgDv5ViFLEt24HHNhLhcEd/KsQpZhv3A42sJcKImHwL+Va
7bTNADSwlwqBMfhfXWpGlCK/dTvgwF4qDO7gX4UoxbzayWJAhZhFnz4sxYAKUYpJtZPFgAoxiz59
WIqBP0cOe+P8j5HKAAAAAElFTkSuQmCC
)
D.
-
已知a,b,c∈R,则下列推证中正确的是( )
A.a>b⇒am2>bm2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFsAAAAjCAYAAAD7R3Y1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKIAAAAjCAYAAAAXHtFmAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
D.