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(Ⅰ)设x≥1,y≥1,证明x+y+≤++xy;(Ⅱ)1≤a≤b≤c,证明logab+lo...
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(Ⅰ)设x≥1,y≥1,证明x+y+
≤
+
+xy;
(Ⅱ)1≤a≤b≤c,证明log
ab+log
bc+log
ca≤log
ba+log
cb+log
ac.
相关试题
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(Ⅰ)设x≥1,y≥1,证明x+y+≤++xy;
(Ⅱ)1≤a≤b≤c,证明logab+logbc+logca≤logba+logcb+logac.
-
(Ⅰ)设x≥1,y≥1,证明x+y+≤++xy;
(Ⅱ)1≤a≤b≤c,证明logab+logbc+logca≤logba+logcb+logac.
-
下列命题中不正确的是( )
A.logab•logbc•logca=1
B.函数f(x)=lnx满足f=f(a)+f(b)
C.函数f(x)=lnx满足f(a+b)=f(a)•f(b)
D.若xlog34=1,则4x+4-x=
-
下列命题中不正确的是( )
A.logab•logbc•logca=1
B.函数f(x)=lnx满足f=f(a)+f(b)
C.函数f(x)=lnx满足f(a+b)=f(a)•f(b)
D.若xlog34=1,则4x+4-x=
-
下列命题中不正确的是( )
A.logab•logbc•logca=1
B.函数f(x)=lnx满足f=f(a)+f(b)
C.函数f(x)=lnx满足f(a+b)=f(a)•f(b)
D.若xlog34=1,则4x+4-x=
-
若,则下列结论中不正确的是( )
A.logab>logba
B.|logab+logba|>2
C.(logba)2<1
D.|logab|+|logba|>|logab+logba|
-
若,则下列结论中不正确的是( )
A.logab>logba
B.|logab+logba|>2
C.(logba)2<1
D.|logab|+|logba|>|logab+logba|
-
若,则下列结论中不正确的是( )
A.logab>logba
B.|logab+logba|>2
C.(logba)2<1
D.|logab|+|logba|>|logab+logba|
-
若,则下列结论中不正确的是( )
A.logab>logba
B.|logab+logba|>2
C.(logba)2<1
D.|logab|+|logba|>|logab+logba|
-
若,则下列结论中不正确的是( )
A.logab>logba
B.|logab+logba|>2
C.(logba)2<1
D.|logab|+|logba|>|logab+logba|