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下列各组函数是同一函数的是①与; ②f(x)=x与;③f(x)=x与; ④f(x)=x2-...
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下列各组函数是同一函数的是( )
①
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAE4AAAAbCAYAAADS6blZAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
与
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFUAAAASCAYAAAAqqJKOAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
;
②f(x)=x与
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEIAAAAbCAYAAADI1VnXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
;
③f(x)=x与
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADYAAAAjCAYAAADfXvn1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
;
④f(x)=x
2-2x-1与g(t)=t
2-2t-1.
A.①②
B.①③
C.③④
D.①④
相关试题
-
下列各组函数是同一函数的是( )
①
与
;
②f(x)=x与
;
③f(x)=x与
;
④f(x)=x2-2x-1与g(t)=t2-2t-1.
A.①②
B.①③
C.③④
D.①④
-
下列各组函数是同一函数的是( )
①
与
;
②f(x)=x与
;
③f(x)=x与
;
④f(x)=x2-2x-1与g(t)=t2-2t-1.
A.①②
B.①③
C.③④
D.①④
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下列各组函数是同一函数的是( )
①
与
;
②f(x)=x与
;
③f(x)=x与
;
④f(x)=x2-2x-1与g(t)=t2-2t-1.
A.①②
B.①③
C.③④
D.①④
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下列各组函数是同一函数的是( )
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③f(x)=x与
;
④f(x)=x2-2x-1与g(t)=t2-2t-1.
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下列各组函数是同一函数的是( )
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下列各组函数是同一函数的是( )
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与
;
②f(x)=x与
;
③f(x)=x与
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A.①②
B.①③
C.③④
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下列各组函数是同一函数的是( )
①
与
;
②f(x)=x与
;
③f(x)=x与
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④f(x)=x2-2x-1与g(t)=t2-2t-1.
A.①②
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下列各组函数是同一函数的是( )
①
与
;
②f(x)=x与
;
③f(x)=x与
;
④f(x)=x2-2x-1与g(t)=t2-2t-1.
A.①②
B.①③
C.③④
D.①④
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下列各组函数是同一函数的是( )
①
与
;
②f(x)=x与
;
③f(x)=x与
;
④f(x)=x2-2x-1与g(t)=t2-2t-1.
A.①②
B.①③
C.③④
D.①④
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下列各组函数是同一函数的是( )
①
与
;
②f(x)=x与
;
③f(x)=x与
;
④f(x)=x2-2x-1与g(t)=t2-2t-1.
A.①②
B.①③
C.③④
D.①④