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If y=f(x) is one-one onto function, then...

If `y=f(x)` is one-one onto function, then: `(fof^-1)(y)=`

A

x

B

y

C

`x/y`

D

`y/x`

Text Solution

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The correct Answer is:
B
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MARVEL PUBLICATION-SETS, RELATIONS AND FUNCTIONS-MCQs
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  2. If y=f(x) is one-one onto function, then: (f^-1@f)(x)=

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  3. If y=f(x) is one-one onto function, then: (fof^-1)(y)=

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  4. If f(x)=(2x+3)/(x-2), then: (f@f)(x)=

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  5. If a function f(x)=(ax+b)/(cx+d) is such that (f@f)(x)=x, then

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  6. If f((a x+b)/(x-a))=x, then f^(-1)(x)= (a) x (b) (bx+a)/(x-b) (c) f(...

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  7. If f(x)=(x-3)/(x+1), then: f(x)=(x-3)/(x+1),

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  8. If f(x)=a-(1)/(x+b), where a+b=1, then: (f@f@f)(x)=

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  9. If f(x)=ax+b and g(x)=cx+d, then f(g(x))=g(f(x)) is equivalent to

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  10. If f(x)=log((1+x)/(1-x))a n dg(x)=((3x+x^3)/(1+3x^2)) , then f(g(x)) i...

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  11. If f(x)=2x^n+a, where f(2)=26 and f(4)=138, then: f(3)=

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  12. If A={(x, y): y = e^x, x in R} and B={(x,y):y=e^(-2x), x in R}, then

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  13. If R is a relation from set A={11 , 12 , 13} to set B={8, 10 , 12} def...

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  14. If f(x)=1-1/x then write the value of f(f(1/x))dot

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  15. If : f(x+1/x)=x^3+1/x^3, where x ne0 then: f(x)=...

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  16. If: AxxB={(1,1),(1,2),(1,3),(2,1),(2,2),(2,3)}, then: A=

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  17. A function f from the set of natural number to integers defined by ...

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  18. If f:RtoR satisfies f(x+y)=f(x)+f(y), for all real x,y and f(1)=m. the...

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  19. If f(n+1)=(2F(n)+1)/2,n=1,3, ,a n dF(1)=2. Then F(101) equals 52 (b) ...

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  20. If : f(x)=root(n)((x^m)), where n inN, is even function then m is

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